chemical bomb vs gas bomb

chemical bomb and gas bomb both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemical bomb	Yes	No	No	No
gas bomb	Yes	No	No	No

As nouns, chemical bomb and gas bomb are synonyms defined as:

chemical bomb and gas bomb: a bomb laden with chemical agents that are released when the bomb explodes

chemical bomb (noun)	gas bomb (noun)
a bomb laden with chemical agents that are released when the bomb explodes	a bomb laden with chemical agents that are released when the bomb explodes