smoke grenade vs smoke bomb

smoke grenade and smoke bomb both are nouns.

Word	Noun	Adjective	Verb	Adverb
smoke grenade	Yes	No	No	No
smoke bomb	Yes	No	No	No

As nouns, smoke grenade and smoke bomb are synonyms defined as:

smoke grenade and smoke bomb: a bomb that gives off thick smoke when it explodes; used to make a smoke screen or to mark a position

smoke grenade (noun)	smoke bomb (noun)
a bomb that gives off thick smoke when it explodes; used to make a smoke screen or to mark a position	a bomb that gives off thick smoke when it explodes; used to make a smoke screen or to mark a position