firebomb vs bombard

firebomb and bombard both are nouns.

Word	Noun	Adjective	Verb	Adverb
firebomb	Yes	No	Yes	No
bombard	Yes	No	Yes	No

As verbs, bombard is a hypernym of firebomb; that is, bombard is a word with a broader meaning than firebomb:

Other hypernyms of firebomb include bomb.

firebomb (noun)	bombard (noun)
a bomb that is designed to start fires; is most effective against flammable targets (such as fuel)	a large shawm; the bass member of the shawm family

firebomb (verb)	bombard (verb)
attack with incendiary bombs	direct high energy particles or radiation against
	address with continuously or persistently, as if with a barrage
	throw bombs at or attack with bombs
	cast, hurl, or throw repeatedly with some missile