ingroup vs coterie

ingroup and coterie both are nouns.

Word	Noun	Adjective	Verb	Adverb
ingroup	Yes	No	No	No
coterie	Yes	No	No	No

As nouns, ingroup and coterie are synonyms defined as:

ingroup and coterie: an exclusive circle of people with a common purpose

Other synonyms of ingroup include camp, clique, inner circle, pack.

ingroup (noun)	coterie (noun)
an exclusive circle of people with a common purpose	an exclusive circle of people with a common purpose