knockout vs smasher

knockout and smasher both are nouns.

Word	Noun	Adjective	Verb	Adverb
knockout	Yes	Yes	No	No
smasher	Yes	No	No	No

As nouns, knockout and smasher are synonyms defined as:

Other synonyms of knockout include beauty, dish, looker, lulu, mantrap, peach, ravisher, stunner, sweetheart.

knockout (noun)	smasher (noun)
a blow that renders the opponent unconscious	a conspicuous success
a very attractive or seductive looking woman	a very attractive or seductive looking woman
	a person who smashes something

knockout (adjective)	smasher (adjective)
very strong or vigorous