coming together vs congress

coming together and congress both are nouns.

Word	Noun	Adjective	Verb	Adverb
coming together	Yes	No	No	No
congress	Yes	No	No	No

As nouns, coming together and congress are synonyms defined as:

coming together and congress: the social act of assembling for some common purpose

Other synonyms of coming together include meeting.

coming together (noun)	congress (noun)
the social act of assembling for some common purpose	the social act of assembling for some common purpose
the act of joining together as one	a meeting of elected or appointed representatives
	a national legislative assembly