trounce vs defeat

trounce is not a noun while defeat is a noun.

Word	Noun	Adjective	Verb	Adverb
trounce	No	No	Yes	No
defeat	Yes	No	Yes	No

As verbs, defeat is a hypernym of trounce; that is, defeat is a word with a broader meaning than trounce:

Other hypernyms of trounce include get the better of, overcome.

trounce (noun)	defeat (noun)
	an unsuccessful ending to a struggle or contest
	the feeling that accompanies an experience of being thwarted in attaining your goals

trounce (verb)	defeat (verb)
censure severely or angrily	win a victory over
come out better in a competition, race, or conflict	thwart the passage of
beat severely with a whip or rod