blowup vs airburst

blowup and airburst both are nouns.

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

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

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

Other hyponyms of blowup include blast, backfire, big bang, backfire, blowback, fragmentation, inflation.

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