fizzle vs hiss

fizzle and hiss both are nouns.

Word	Noun	Adjective	Verb	Adverb
fizzle	Yes	No	Yes	No
hiss	Yes	No	Yes	No

As nouns, fizzle and hiss are synonyms defined as:

fizzle and hiss: a fricative sound (especially as an expression of disapproval)

Other synonyms of fizzle include hissing, hushing, sibilation.

fizzle (noun)	hiss (noun)
a complete failure	a cry or noise made to express displeasure or contempt
a fricative sound (especially as an expression of disapproval)	a fricative sound (especially as an expression of disapproval)

fizzle (verb)	hiss (verb)
end weakly	make a sharp hissing sound, as if to show disapproval
	express or utter with a hiss
	show displeasure, as after a performance or speech
	move with a whooshing sound