data vs collection

data and collection both are nouns.

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

As nouns, collection is a hypernym of data; that is, collection is a word with a broader meaning than data:

Other hypernyms of data include accumulation, aggregation, assemblage.

data (noun)	collection (noun)
a collection of facts from which conclusions may be drawn	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