airburst vs blowup

airburst and blowup both are nouns.

Word	Noun	Adjective	Verb	Adverb
airburst	Yes	No	No	No
blowup	Yes	No	No	No

As nouns, blowup is a hypernym of airburst; that is, blowup is a word with a broader meaning than airburst:

airburst: an explosion in the atmosphere
blowup: a violent release of energy caused by a chemical or nuclear reaction

Other hypernyms of airburst include detonation, explosion.

airburst (noun)	blowup (noun)
an explosion in the atmosphere	a photographic print that has been enlarged
	an unrestrained expression of emotion
	a violent release of energy caused by a chemical or nuclear reaction