override vs prevail

override is a noun but prevail is not a noun.

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

As verbs, prevail is a hypernym of override; that is, prevail is a word with a broader meaning than override:

Other hypernyms of override include dominate, predominate, reign, rule.

override (noun)	prevail (noun)
the act of nullifying; making null and void; counteracting or overriding the effect or force of something
a manually operated device to correct the operation of an automatic device

override (verb)	prevail (verb)
rule against	use persuasion successfully
ride (a horse) too hard	prove superior
counteract the normal operation of (an automatic gear shift in a vehicle)	continue to exist
prevail over	be valid, applicable, or true
	be larger in number, quantity, power, status or importance