triumph vs prevail

triumph is a noun but prevail is not a noun.

Word	Noun	Adjective	Verb	Adverb
triumph	Yes	No	Yes	No
prevail	No	No	Yes	No

As verbs, triumph and prevail are synonyms defined as:

triumph (noun)	prevail (noun)
a successful ending of a struggle or contest
the exultation of victory

triumph (verb)	prevail (verb)
dwell on with satisfaction	use persuasion successfully
to express great joy	prove superior
prove superior	continue to exist
be ecstatic with joy	be valid, applicable, or true
	be larger in number, quantity, power, status or importance