stench bomb vs stink bomb

stench bomb and stink bomb both are nouns.

Word	Noun	Adjective	Verb	Adverb
stench bomb	Yes	No	No	No
stink bomb	Yes	No	No	No

As nouns, stench bomb and stink bomb are synonyms defined as:

stench bomb and stink bomb: a small bomb designed to give off a foul odor when it explodes

stench bomb (noun)	stink bomb (noun)
a small bomb designed to give off a foul odor when it explodes	a small bomb designed to give off a foul odor when it explodes