fluff vs triviality

fluff and triviality both are nouns.

Word	Noun	Adjective	Verb	Adverb
fluff	Yes	No	Yes	No
triviality	Yes	No	No	No

As nouns, triviality is a hypernym of fluff; that is, triviality is a word with a broader meaning than fluff:

Other hypernyms of fluff include small beer, trifle, trivia.

fluff (noun)	triviality (noun)
a blunder (especially an actor's forgetting the lines)	something of small importance
something of little value or significance	the quality of being unimportant and petty or frivolous
any light downy material	a detail that is considered insignificant

fluff (verb)	triviality (verb)
ruffle (one's hair) by combing the ends towards the scalp, for a full effect
erect or fluff up
make a mess of, destroy or ruin