prevail vs reign

prevail is not a noun while reign is a noun.

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

As verbs, prevail and reign are synonyms defined as:

prevail and reign: be larger in number, quantity, power, status or importance

Other synonyms of prevail include dominate, predominate, rule.

prevail (noun)	reign (noun)
	royal authority; the dominion of a monarch
	the period during which a monarch is sovereign
	a period during which something or somebody is dominant or powerful

prevail (verb)	reign (verb)
use persuasion successfully	have sovereign power
prove superior	be larger in number, quantity, power, status or importance
continue to exist
be valid, applicable, or true
be larger in number, quantity, power, status or importance