diamante vs adornment

diamante and adornment both are nouns.

Word	Noun	Adjective	Verb	Adverb
diamante	Yes	No	No	No
adornment	Yes	No	No	No

As nouns, adornment is a hypernym of diamante; that is, adornment is a word with a broader meaning than diamante:

diamante: adornment consisting of a small piece of shiny material used to decorate clothing
adornment: a decoration of color or interest that is added to relieve plainness

diamante (noun)	adornment (noun)
adornment consisting of a small piece of shiny material used to decorate clothing	the action of decorating yourself with something colorful and interesting
fabric covered with glittering ornaments such as sequins or rhinestones	a decoration of color or interest that is added to relieve plainness