technical knockout vs kayo

technical knockout and kayo both are nouns.

Word	Noun	Adjective	Verb	Adverb
technical knockout	Yes	No	No	No
kayo	Yes	No	Yes	No

As nouns, kayo is a hypernym of technical knockout; that is, kayo is a word with a broader meaning than technical knockout:

technical knockout: a knockout declared by the referee who judges one boxer unable to continue
kayo: a blow that renders the opponent unconscious

Other hypernyms of technical knockout include knockout, KO.

technical knockout (noun)	kayo (noun)
a knockout declared by the referee who judges one boxer unable to continue	a blow that renders the opponent unconscious

technical knockout (verb)	kayo (verb)
	knock unconscious or senseless