neurology
neurology (n)
The science of the nervous system.
neuter
neuter (adj)
Neither masculine nor feminine.
neutral
neutral (adj)
Belonging to or under control of neither of two contestants.
Newtonian
Newtonian (adj)
Of or pertaining to Sir Isaac Newton, the English philosopher.
niggardly
niggardly (adj)
Stingy. (no longer acceptable to use)
nihilist
nihilist (n)
An advocate of the doctrine that nothing either exists or can be known.
nil
nil (n)
Nothing
nimble
nimble (adj)
Light and quick in motion or action.
nit
nit (n)
The egg of a louse or some other insect.
nocturnal
nocturnal (adj)
Of or pertaining to the night.
noiseless
noiseless (adj)
Silent.
noisome
noisome (adj)
Very offensive, particularly to the sense of smell.
noisy
noisy (adj)
Clamorous.
nomad
nomad (adj)
Having no fixed abode.
nomic
nomic (adj)
Usual or customary.
nominal
nominal (adj)
Trivial.
nominate
nominate (v)
To designate as a candidate for any office.
nomination
nomination (n)
The act or ceremony of naming a man or woman for office.
nominee
nominee (n)
One who receives a nomination.
non-existent
non-existent (n)
That which does not exist.
non-resident
non-resident (adj)
Not residing within a given jurisdiction.
nonchalance
nonchalance (n)
A state of mind indicating lack of interest.
non-combatant
non-combatant (n)
One attached to the army or navy, but having duties other than that of fighting.
nondescript
nondescript (adj)
Indescribable.
nonentity
nonentity (n)
A person or thing of little or no account.
nonpareil
nonpareil (n)
One who or that which is of unequaled excellence.
norm
norm (n)
A model.
normalcy
normalcy (n)
The state of being normal.
Norman
Norman (adj)
Of or peculiar to Normandy, in northern France.
nostrum
nostrum (n)
Any scheme or recipe of a charlatan character.
noticeable
noticeable (adj)
Perceptible.
notorious
notorious (adj)
Unfavorably known to the general public.
novellette
novellette (n)
A short novel.
novice
novice (n)
A beginner in any business or occupation.
nowadays
nowadays (adv)
In the present time or age.
nowhere
nowhere (adv)
In no place or state.
noxious
noxious (adj)
Hurtful.
nuance
nuance (n)
A slight degree of difference in anything perceptible to the sense of the mind.
nucleus
nucleus (n)
A central point or part about which matter is aggregated.
nude
nude (adj)
Naked.
nugatory
nugatory (adj)
Having no power or force.
nuisance
nuisance (n)
That which annoys, vexes, or irritates.
numeration
numeration (n)
The act or art of reading or naming numbers.
numerical
numerical (adj)
Of or pertaining to number.
nunnery
nunnery (n)
A convent for nuns.
nuptial
nuptial (adj)
Of or pertaining to marriage, especially to the marriage ceremony.
nurture
nurture (n)
The process of fostering or promoting growth.
nutriment
nutriment (n)
That which nourishes.
nutritive
nutritive (adj)
Having nutritious properties.
oaken
oaken (adj)
Made of or from oak.
oakum
oakum (n)
Hemp-fiber obtained by untwisting and picking out loosely the yarns of old hemp rope.
obdurate
obdurate (adj)
Impassive to feelings of humanity or pity.
obelisk
obelisk (n)
A square shaft with pyramidal top, usually monumental or commemorative.
obese
obese (adj)
Exceedingly fat.
obesity
obesity (n)
Excessive fatness.
obituary
obituary (adj)
A published notice of a death.
objective
objective (adj)
Grasping and representing facts as they are.
objector
objector (n)
One who objects, as to a proposition, measure, or ruling.
obligate
obligate (v)
To hold to the fulfillment of duty.
obligatory
obligatory (adj)
Binding in law or conscience.
oblique
oblique (adj)
Slanting; said of lines.
obliterate
obliterate (v)
To cause to disappear.
oblivion
oblivion (n)
The state of having passed out of the memory or of being utterly forgotten.
oblong
oblong (adj)
Longer than broad: applied most commonly to rectangular objects considerably elongated
obnoxious
obnoxious (adj)
Detestable.
obsequies
obsequies (n)
Funeral rites.
obsequious
obsequious (adj)
Showing a servile readiness to fall in with the wishes or will of another.
observance
observance (n)
A traditional form or customary act.
observant
observant (adj)
Quick to notice.
observatory
observatory (n)
A building designed for systematic astronomical observations.
obsolescence
obsolescence (n)
The condition or process of gradually falling into disuse.
obsolescent
obsolescent (adj)
Passing out of use, as a word.
obsolete
obsolete (adj)
No longer practiced or accepted.
obstetrician
obstetrician (n)
A practitioner of midwifery.
obstetrics
obstetrics (n)
The branch of medical science concerned with the treatment and care of women during pregnancy.
obstinacy
obstinacy (n)
Stubborn adherence to opinion, arising from conceit or the desire to have one's own way.
obstreperous
obstreperous (adj)
Boisterous.
obstruct
obstruct (v)
To fill with impediments so as to prevent passage, either wholly or in part.
obstruction
obstruction (n)
Hindrance.
obtrude
obtrude (v)
To be pushed or to push oneself into undue prominence.
obtrusive
obtrusive (adj)
Tending to be pushed or to push oneself into undue prominence.
obvert
obvert (v)
To turn the front or principal side of (a thing) toward any person or object.
obviate
obviate (v)
To clear away or provide for, as an objection or difficulty.
occasion
occasion (n)
An important event or celebration.
Occident
Occident (n)
The countries lying west of Asia and the Turkish dominions.
occlude
occlude (v)
To absorb, as a gas by a metal.
occult
occult (adj)
Existing but not immediately perceptible.
occupant
occupant (n)
A tenant in possession of property, as distinguished from the actual owner.
occurrence
occurrence (n)
A happening.
octagon
octagon (n)
A figure with eight sides and eight angles.
octave
octave (n)
A note at this interval above or below any other, considered in relation to that other.
octavo
octavo (n)
A book, or collection of paper in which the sheets are so folded as to make eight leaves.
octogenarian
octogenarian (adj)
A person of between eighty and ninety years.
ocular
ocular (adj)
Of or pertaining to the eye.
oculist
oculist (n)
One versed or skilled in treating diseases of the eye.
oddity
oddity (n)
An eccentricity.
ode
ode (n)
The form of lyric poetry anciently intended to be sung.
odious
odious (adj)
Hateful.
odium
odium (n)
A feeling of extreme repugnance, or of dislike and disgust.
odoriferous
odoriferous (adj)
Having or diffusing an odor or scent, especially an agreeable one.
odorous
odorous (adj)
Having an odor, especially a fragrant one.
off
off (adj)
Farther or more distant.
offhand
offhand (adv)
Without preparation.
officiate
officiate (v)
To act as an officer or leader.
officious
officious (adj)
Intermeddling with what is not one's concern.
offshoot
offshoot (n)
Something that branches off from the parent stock.
ogre
ogre (n)
A demon or monster that was supposed to devour human beings.
ointment
ointment (n)
A fatty preparation with a butter-like consistency in which a medicinal substance exists.
olfactory
olfactory (adj)
of or pertaining to the sense of smell.
olive-branch
olive-branch (n)
A branch of the olive-tree, as an emblem of peace.
ominous
ominous (adj)
Portentous.
omission
omission (n)
Exclusion.
omnipotence
omnipotence (n)
Unlimited and universal power.
Omnipotent
Omnipotent (adj)
Possessed of unlimited and universal power.
omniscience
omniscience (n)
Unlimited or infinite knowledge.
omniscient
omniscient (adj)
Characterized by unlimited or infinite knowledge.
omnivorous
omnivorous (adj)
Eating or living upon food of all kinds indiscriminately.
onerous
onerous (adj)
Burdensome or oppressive.
onrush
onrush (n)
Onset.
onset
onset (n)
An assault, especially of troops, upon an enemy or fortification.
onslaught
onslaught (n)
A violent onset.
onus
onus (n)
A burden or responsibility.
opalescence
opalescence (n)
The property of combined refraction and reflection of light, resulting in smoky tints.
opaque
opaque (adj)
Impervious to light.
operate
operate (v)
To put in action and supervise the working of.
operative
operative (adj)
Active.
operator
operator (n)
One who works with or controls some machine or scientific apparatus.
operetta
operetta (n)
A humorous play in dialogue and music, of more than one act.
opinion
opinion (n)
A conclusion or judgment held with confidence, but falling short of positive knowledge.
opponent
opponent (n)
One who supports the opposite side in a debate, discussion, struggle, or sport.
opportune
opportune (adj)
Especially fit as occurring, said, or done at the right moment.
opportunist
opportunist (n)
One who takes advantage of circumstances to gain his ends.
opportunity
opportunity (n)
Favorable or advantageous chance or opening.
opposite
opposite (adj)
Radically different or contrary in action or movement.
opprobrium
opprobrium (n)
The state of being scornfully reproached or accused of evil.
optic
optic (n)
Pertaining to the eye or vision.
optician
optician (n)
One who makes or deals in optical instruments or eye-glasses.
optics
optics (n)
The science that treats of light and vision, and all that is connected with sight.
optimism
optimism (n)
The view that everything in nature and the history of mankind is ordered for the best.
option
option (n)
The right, power, or liberty of choosing.
optometry
optometry (n)
Measurement of the powers of vision.
opulence
opulence (n)
Affluence.
opulent
opulent (adj)
Wealthy.
oral
oral (adj)
Uttered through the mouth.
orate
orate (v)
To deliver an elaborate or formal public speech.
oration
oration (n)
An elaborate or formal public speech.
orator
orator (n)
One who delivers an elaborate or formal speech.
oratorio
oratorio (n)
A composition for solo voices, chorus, and orchestra, generally taken from the Scriptures.
oratory
oratory (n)
The art of public speaking.
ordeal
ordeal (n)
Anything that severely tests courage, strength, patience, conscience, etc.
ordinal
ordinal (n)
That form of the numeral that shows the order of anything in a series, as first, second, third.
ordination
ordination (n)
A consecration to the ministry.
ordnance
ordnance (n)
A general name for all kinds of weapons and their appliances used in war.
orgies
orgies (n)
Wild or wanton revelry.
origin
origin (n)
The beginning of that which becomes or is made to be.
original
original (adj)
Not copied nor produced by imitation.
originate
originate (v)
To cause or constitute the beginning or first stage of the existence of.
ornate
ornate (adj)
Ornamented to a marked degree.
orthodox
orthodox (adj)
Holding the commonly accepted faith.
orthodoxy
orthodoxy (n)
Acceptance of the common faith.
orthogonal
orthogonal (adj)
Having or determined by right angles.
orthopedic
orthopedic (adj)
Relating to the correcting or preventing of deformity
orthopedist
orthopedist (n)
One who practices the correcting or preventing of deformity
oscillate
oscillate (v)
To swing back and forth.
osculate
osculate (v)
To kiss.
ossify
ossify (v)
to convert into bone.
ostentation
ostentation (n)
A display dictated by vanity and intended to invite applause or flattery.
ostracism
ostracism (n)
Exclusion from intercourse or favor, as in society or politics.
ostracize
ostracize (v)
To exclude from public or private favor.
ought
ought (v)
To be under moral obligation to be or do.
oust
oust (v)
To eject.
out-and-out
out-and-out (adv)
Genuinely.
outbreak
outbreak (n)
A sudden and violent breaking forth, as of something that has been pent up or restrained.
outburst
outburst (n)
A violent issue, especially of passion in an individual.
outcast
outcast (n)
One rejected and despised, especially socially.
outcry
outcry (n)
A vehement or loud cry or clamor.
outdo
outdo (v)
To surpass.
outlandish
outlandish (adj)
Of barbarous, uncouth, and unfamiliar aspect or action.
outlast
outlast (v)
To last longer than.
outlaw
outlaw (n)
A habitual lawbreaker.
outlive
outlive (v)
To continue to exist after.
out-of-the-way
out-of-the-way (adj)
Remotely situated.
outpost
outpost (n)
A detachment of troops stationed at a distance from the main body to guard against surprise.
outrage
outrage (n)
A gross infringement of morality or decency.
outrageous
outrageous (adj)
Shocking in conduct.
outreach
outreach (v)
To reach or go beyond.
outride
outride (v)
To ride faster than.
outrigger
outrigger (n)
A part built or arranged to project beyond a natural outline for support.
outright
outright (adv)
Entirely.
outskirt
outskirt (n)
A border region.
outstretch
outstretch (v)
To extend.
outstrip
outstrip (v)
To go beyond.
outweigh
outweigh (v)
To surpass in importance or excellence.
overdo
overdo (v)
To overtax the strength of.
overdose
overdose (n)
An excessive dose, usually so large a dose of a medicine that its effect is toxic.
overeat
overeat (v)
To eat to excess.