blowup vs explosion

blowup and explosion both are nouns.

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

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

Other hyponyms of blowup include acting out, cry, flare.

As nouns, blowup and explosion are synonyms defined as:

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

Other synonyms of blowup include detonation.

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