stench vs fetor

stench and fetor both are nouns.

Word	Noun	Adjective	Verb	Adverb
stench	Yes	No	No	No
fetor	Yes	No	No	No

As nouns, stench and fetor are synonyms defined as:

Other synonyms of stench include foetor, malodor, malodour, mephitis, reek, stink.

stench (noun)	fetor (noun)
a distinctive odor that is offensively unpleasant	a distinctive odor that is offensively unpleasant