relieve vs mitigate

relieve and mitigate both are verbs.

Word	Noun	Adjective	Verb	Adverb
relieve	No	No	Yes	No
mitigate	No	No	Yes	No

As verbs, mitigate is a hypernym of relieve; that is, mitigate is a word with a broader meaning than relieve:

relieve (verb)	mitigate (verb)
provide physical relief, as from pain	to temper
provide relief for	lessen or to try to lessen the seriousness or extent of
alleviate or remove (pressure or stress) or make less oppressive
relieve oneself of troubling information
grant exemption or release to
lessen the intensity of or calm
take by stealing
free from a burden, evil, or distress
save from ruin, destruction, or harm
free someone temporarily from his or her obligations
grant relief or an exemption from a rule or requirement to