congregate vs congregation

congregate is not a noun while congregation is a noun.

Word	Noun	Adjective	Verb	Adverb
congregate	No	No	Yes	No
congregation	Yes	No	No	No

congregate (noun)	congregation (noun)
	the act of congregating
	a group of people who adhere to a common faith and habitually attend a given church
	an assemblage of people or animals or things collected together

congregate (verb)	congregation (verb)
come together, usually for a purpose