collation vs collecting

collation and collecting both are nouns.

Word	Noun	Adjective	Verb	Adverb
collation	Yes	No	No	No
collecting	Yes	No	No	No

As nouns, collecting is a hypernym of collation; that is, collecting is a word with a broader meaning than collation:

Other hypernyms of collation include aggregation, assembling, collection.

collation (noun)	collecting (noun)
careful examination and comparison to note points of disagreement	the act of gathering something together
assembling in proper numerical or logical sequence
a light informal meal