signage vs aggregation

signage and aggregation both are nouns.

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

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

Other hypernyms of signage include accumulation, assemblage, collection.

signage (noun)	aggregation (noun)
signs collectively (especially commercial signs or posters)	the act of gathering something together
	several things grouped together or considered as a whole