technical knockout vs KO

technical knockout and KO both are nouns.

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

As nouns, KO is a hypernym of technical knockout; that is, KO 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
KO: a blow that renders the opponent unconscious

Other hypernyms of technical knockout include kayo, knockout.

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