explosion vs airburst

explosion and airburst both are nouns.

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

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

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

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

explosion (noun)	airburst (noun)
the act of exploding or bursting	an explosion in the atmosphere
a golf shot from a bunker that typically moves sand as well as the golf ball
the terminal forced release of pressure built up during the occlusive phase of a stop consonant
a sudden outburst
a violent release of energy caused by a chemical or nuclear reaction
a sudden great increase
the noise caused by an explosion