collation vs aggregation

collation and aggregation both are nouns.

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

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

Other hypernyms of collation include assembling, collecting, collection.

collation (noun)	aggregation (noun)
careful examination and comparison to note points of disagreement	the act of gathering something together
assembling in proper numerical or logical sequence	several things grouped together or considered as a whole
a light informal meal