a distinct part or portion, or subdivision
section
a sociological, economic, or political subdivision, or a mapped portion of a region
sector
having or likely to have influence or effect
significant
having characteristics in common
similar
to spring forth, a point or origin
source
restricted to a particular situation, relation, individual, or effect
specific
something arranged in a definite pattern of organization
structure
the general or abstract principles of a body of fact, a science, or an art
theory
a quantity that may assume any one of a set of values
variables