comparison vs collation

comparison and collation both are nouns.

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

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

comparison: the act of examining resemblances
collation: careful examination and comparison to note points of disagreement

Other hyponyms of comparison include likening, analogy, confrontation, contrast.

comparison (noun)	collation (noun)
the act of examining resemblances	careful examination and comparison to note points of disagreement
qualities that are comparable	assembling in proper numerical or logical sequence
relation based on similarities and differences	a light informal meal