getting even vs revenge

getting even and revenge both are nouns.

Word	Noun	Adjective	Verb	Adverb
getting even	Yes	No	No	No
revenge	Yes	No	Yes	No

As nouns, revenge is a hyponym of getting even; that is, revenge is a word with a more specific, narrower meaning than getting even:

Other hyponyms of getting even include payment, requital, retaliation, reciprocation, tit for tat.

getting even (noun)	revenge (noun)
a reciprocal group action	action taken in return for an injury or offense

getting even (verb)	revenge (verb)
	take revenge for a perceived wrong