smelly vs foetid

smelly and foetid both are adjectives.

Word	Noun	Adjective	Verb	Adverb
smelly	No	Yes	No	No
foetid	No	Yes	No	No

As adjectives, smelly and foetid are synonyms defined as:

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

smelly (adjective)	foetid (adjective)
offensively malodorous	offensively malodorous