fluff vs trivia

fluff and trivia both are nouns.

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

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

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

fluff (noun)	trivia (noun)
a blunder (especially an actor's forgetting the lines)	something of small importance
something of little value or significance
any light downy material

fluff (verb)	trivia (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