boil vs sizzle

boil and sizzle both are nouns.

Word	Noun	Adjective	Verb	Adverb
boil	Yes	No	Yes	No
sizzle	Yes	No	Yes	No

As verbs, sizzle is a hyponym of boil; that is, sizzle is a word with a more specific, narrower meaning than boil:

Other hyponyms of boil include bubble over, overflow, spill over, ferment.

boil (noun)	sizzle (noun)
the temperature at which a liquid boils at sea level	a sizzling noise
a painful sore with a hard core filled with pus

boil (verb)	sizzle (verb)
immerse or be immersed in a boiling liquid, often for cooking purposes	burn or sear with a sizzling sound
come to the boiling point and change from a liquid to vapor	make a sound like frying fat
bring to, or maintain at, the boiling point	seethe with deep anger or resentment
be in an agitated emotional state
be agitated