overbalance vs reign

overbalance is not a noun while reign is a noun.

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

As verbs, reign is a hypernym of overbalance; that is, reign is a word with a broader meaning than overbalance:

Other hypernyms of overbalance include dominate, predominate, prevail, rule.

overbalance (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

overbalance (verb)	reign (verb)
cause to be off balance	have sovereign power
weigh more heavily	be larger in number, quantity, power, status or importance