octet vs assemblage

octet and assemblage both are nouns.

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

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

Other hypernyms of octet include gathering.

octet (noun)	assemblage (noun)
a musical composition written for eight performers	the social act of assembling
eight people considered as a unit	a system of components assembled together for a particular purpose
a set of eight similar things considered as a unit	a group of persons together in one place
eight performers or singers who perform together	several things grouped together or considered as a whole
the cardinal number that is the sum of seven and one