bombing vs bomb

bombing and bomb both are nouns.

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

bombing (noun)	bomb (noun)
an attack by dropping bombs	an explosive device fused to explode under specific conditions
the use of bombs for sabotage; a tactic frequently used by terrorists	strong sealed vessel for measuring heat of combustion
	an event that fails badly or is totally ineffectual

bombing (verb)	bomb (verb)
	throw bombs at or attack with bombs
	fail to get a passing grade