convention vs assemblage

convention and assemblage both are nouns.

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

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

Other hypernyms of convention include assembly, gathering.

convention (noun)	assemblage (noun)
the act of convening	the social act of assembling
orthodoxy as a consequence of being conventional	a system of components assembled together for a particular purpose
something regarded as a normative example	a group of persons together in one place
(diplomacy) an international agreement	several things grouped together or considered as a whole
a large formal assembly