bomb vs assail

bomb is a noun but assail is not a noun.

Word	Noun	Adjective	Verb	Adverb
bomb	Yes	No	Yes	No
assail	No	No	Yes	No

As verbs, assail is a hypernym of bomb; that is, assail is a word with a broader meaning than bomb:

bomb: throw bombs at or attack with bombs
assail: launch an attack or assault on; begin hostilities or start warfare with

Other hypernyms of bomb include attack.

bomb (noun)	assail (noun)
an explosive device fused to explode under specific conditions
strong sealed vessel for measuring heat of combustion
an event that fails badly or is totally ineffectual

bomb (verb)	assail (verb)
throw bombs at or attack with bombs	attack in speech or writing
fail to get a passing grade	attack someone physically or emotionally
	launch an attack or assault on; begin hostilities or start warfare with