collection vs compiling

collection and compiling both are nouns.

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

As nouns, compiling is a hyponym of collection; that is, compiling is a word with a more specific, narrower meaning than collection:

collection (noun)	compiling (noun)
the act of gathering something together	the act of compiling (as into a single book or file or list)
a publication containing a variety of works
request for a sum of money
several things grouped together or considered as a whole