miscellany vs aggregation

miscellany and aggregation both are nouns.

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

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

Other hypernyms of miscellany include accumulation, assemblage, collection.

miscellany (noun)	aggregation (noun)
an anthology of short literary pieces and poems and ballads etc.	the act of gathering something together
a collection containing a variety of sorts of things	several things grouped together or considered as a whole