bombing vs area bombing

bombing and area bombing both are nouns.

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

As nouns, area bombing is a hyponym of bombing; that is, area bombing is a word with a more specific, narrower meaning than bombing:

bombing: an attack by dropping bombs
area bombing: an extensive and systematic bombing intended to devastate a large target

Other hyponyms of bombing include bombing run, carpet bombing, saturation bombing.

bombing (noun)	area bombing (noun)
an attack by dropping bombs	an extensive and systematic bombing intended to devastate a large target
the use of bombs for sabotage; a tactic frequently used by terrorists