relieve vs let off

relieve and let off both are verbs.

Word	Noun	Adjective	Verb	Adverb
relieve	No	No	Yes	No
let off	No	No	Yes	No

As verbs, relieve and let off are synonyms defined as:

Other synonyms of relieve include excuse, exempt.

relieve (verb)	let off (verb)
provide physical relief, as from pain	grant exemption or release to
provide relief for
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