explosion vs blowup

explosion and blowup both are nouns.

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

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

Other hypernyms of explosion include ebullition, effusion, gush, outburst.

As nouns, explosion and blowup are synonyms defined as:

explosion and blowup: a violent release of energy caused by a chemical or nuclear reaction

Other synonyms of explosion include detonation.

explosion (noun)	blowup (noun)
the act of exploding or bursting	a photographic print that has been enlarged
a golf shot from a bunker that typically moves sand as well as the golf ball	an unrestrained expression of emotion
the terminal forced release of pressure built up during the occlusive phase of a stop consonant	a violent release of energy caused by a chemical or nuclear reaction
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