tea break vs collation

tea break and collation both are nouns.

Word	Noun	Adjective	Verb	Adverb
tea break	Yes	No	No	No
collation	Yes	No	No	No

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

Other hypernyms of tea break include bite, snack.

tea break (noun)	collation (noun)
a short break from work	careful examination and comparison to note points of disagreement
	assembling in proper numerical or logical sequence
	a light informal meal