As nouns the difference between communist and noncommunist
is that communist is a member of a (nominally) communist party while noncommunist is one who is not a communist.
As an adjective communist
is relating to a (nominally) communist party.
communist
English
Adjective
(head)
Of, relating to, supporting, or advocating communism.
Noun
(
en noun)
An advocate of a society based on the common ownership of property; a proponent of communism.
(nonstandard) Any revolutionary or subversive radical.