triad vs assemblage

triad and assemblage both are nouns.

Word	Noun	Adjective	Verb	Adverb
triad	Yes	No	No	No
assemblage	Yes	No	No	No

As nouns, assemblage is a hypernym of triad; that is, assemblage is a word with a broader meaning than triad:

Other hypernyms of triad include gathering.

triad (noun)	assemblage (noun)
a three-note major or minor chord; a note and its third and fifth tones	the social act of assembling
three people considered as a unit	a system of components assembled together for a particular purpose
a set of three similar things considered as a unit	a group of persons together in one place
the cardinal number that is the sum of one and one and one	several things grouped together or considered as a whole