irradiate vs lighten

irradiate and lighten both are verbs.

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

As verbs, lighten is a hypernym of irradiate; that is, lighten is a word with a broader meaning than irradiate:

Other hypernyms of irradiate include lighten up.

irradiate (verb)	lighten (verb)
expose to radiation	make more cheerful through the use of color
cast rays of light upon	become lighter
give spiritual insight to; in religion	alleviate or remove (pressure or stress) or make less oppressive
	become more cheerful
	reduce the weight on; make lighter
	make more cheerful