explosion vs blowback

explosion and blowback both are nouns.

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

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

explosion: a violent release of energy caused by a chemical or nuclear reaction
blowback: the backward escape of gases and unburned gunpowder after a gun is fired

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

explosion (noun)	blowback (noun)
the act of exploding or bursting	Blowback is a system of operation for self-loading firearms that obtains energy from the motion of the cartridge case as it is pushed to the rear by expanding gases created by the ignition of the propellant charge.
a golf shot from a bunker that typically moves sand as well as the golf ball	misinformation resulting from the recirculation into the source country of disinformation previously planted abroad by that country's intelligence service
the terminal forced release of pressure built up during the occlusive phase of a stop consonant	the backward escape of gases and unburned gunpowder after a gun is fired
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