unpleasant-smelling vs stinky

unpleasant-smelling and stinky both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unpleasant-smelling	No	Yes	No	No
stinky	No	Yes	No	No

As adjectives, unpleasant-smelling and stinky are synonyms defined as:

Other synonyms of unpleasant-smelling include ill-smelling, malodorous, malodourous.

unpleasant-smelling (adjective)	stinky (adjective)
having an unpleasant smell	having an unpleasant smell
	very bad