knock out vs eliminate

knock out and eliminate both are verbs.

Word	Noun	Adjective	Verb	Adverb
knock out	No	No	Yes	No
eliminate	No	No	Yes	No

As verbs, eliminate is a hypernym of knock out; that is, eliminate is a word with a broader meaning than knock out:

Other hypernyms of knock out include do away with, extinguish, get rid of.

knock out (verb)	eliminate (verb)
destroy or break forcefully	eliminate from the body
eliminate	kill in large numbers
empty (as of tobacco) by knocking out	terminate, end, or take out
knock unconscious or senseless	remove (an unknown variable) from two or more equations
overwhelm with admiration	dismiss from consideration or a contest
	remove from a contest or race
	get rid of something