detonation vs big bang

detonation and big bang both are nouns.

Word	Noun	Adjective	Verb	Adverb
detonation	Yes	No	No	No
big bang	Yes	No	No	No

As nouns, big bang is a hyponym of detonation; that is, big bang is a word with a more specific, narrower meaning than detonation:

detonation: a violent release of energy caused by a chemical or nuclear reaction
big bang: (cosmology) the cosmic explosion that is hypothesized to have marked the origin of the universe

Other hyponyms of detonation include airburst, blast, backfire, backfire, blowback, fragmentation, inflation.

detonation (noun)	big bang (noun)
the act of detonating an explosive	(cosmology) the cosmic explosion that is hypothesized to have marked the origin of the universe
a violent release of energy caused by a chemical or nuclear reaction