reign vs override

reign and override both are nouns.

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

As verbs, override is a hyponym of reign; that is, override is a word with a more specific, narrower meaning than reign:

Other hyponyms of reign include overarch, outbalance, outweigh, overbalance, preponderate.

reign (noun)	override (noun)
royal authority; the dominion of a monarch	the act of nullifying; making null and void; counteracting or overriding the effect or force of something
the period during which a monarch is sovereign	a manually operated device to correct the operation of an automatic device
a period during which something or somebody is dominant or powerful

reign (verb)	override (verb)
have sovereign power	rule against
be larger in number, quantity, power, status or importance	ride (a horse) too hard
	counteract the normal operation of (an automatic gear shift in a vehicle)
	prevail over