simmering vs stewing

simmering and stewing both are nouns.

Word	Noun	Adjective	Verb	Adverb
simmering	Yes	No	No	No
stewing	Yes	No	No	No

As nouns, simmering and stewing are synonyms defined as:

simmering and stewing: cooking in a liquid that has been brought to a boil

Other synonyms of simmering include boiling.

simmering (noun)	stewing (noun)
cooking in a liquid that has been brought to a boil	cooking in a liquid that has been brought to a boil
	an extreme state of worry and agitation