mitigate vs lighten

mitigate and lighten both are verbs.

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

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

Other hyponyms of mitigate include relieve.

mitigate (verb)	lighten (verb)
to temper	make more cheerful through the use of color
lessen or to try to lessen the seriousness or extent of	become lighter
	alleviate or remove (pressure or stress) or make less oppressive
	become more cheerful
	reduce the weight on; make lighter
	make more cheerful