retaliate vs get back

retaliate and get back both are verbs.

Word	Noun	Adjective	Verb	Adverb
retaliate	No	No	Yes	No
get back	No	No	Yes	No

As verbs, get back is a hyponym of retaliate; that is, get back is a word with a more specific, narrower meaning than retaliate:

Other hyponyms of retaliate include get even.

retaliate (verb)	get back (verb)
make a counterattack and return like for like, especially evil for evil	take revenge or even out a score
take revenge for a perceived wrong	recover something or somebody that appeared to be lost
	get one's revenge for a wrong or an injury