ingathering vs collection

ingathering and collection both are nouns.

Word	Noun	Adjective	Verb	Adverb
ingathering	Yes	No	No	No
collection	Yes	No	No	No

As nouns, ingathering and collection are synonyms defined as:

Other synonyms of ingathering include appeal, solicitation.

ingathering (noun)	collection (noun)
request for a sum of money	the act of gathering something together
	a publication containing a variety of works
	request for a sum of money
	several things grouped together or considered as a whole