foul-smelling vs foetid

foul-smelling and foetid both are adjectives.

Word	Noun	Adjective	Verb	Adverb
foul-smelling	No	Yes	No	No
foetid	No	Yes	No	No

As adjectives, foul-smelling and foetid are synonyms defined as:

Other synonyms of foul-smelling include fetid, foul, funky, ill-scented, noisome, smelly, stinking.

foul-smelling (adjective)	foetid (adjective)
offensively malodorous	offensively malodorous