feast one's eyes vs savour

feast one's eyes is not a noun while savour is a noun.

Word	Noun	Adjective	Verb	Adverb
feast one's eyes	No	No	Yes	No
savour	Yes	No	Yes	No

As verbs, savour is a hypernym of feast one's eyes; that is, savour is a word with a broader meaning than feast one's eyes:

feast one's eyes: look at with great enjoyment
savour: derive or receive pleasure from; get enjoyment from; take pleasure in

Other hypernyms of feast one's eyes include bask, enjoy, relish, savor.

feast one's eyes (noun)	savour (noun)
	the taste experience when a savoury condiment is taken into the mouth

feast one's eyes (verb)	savour (verb)
look at with great enjoyment	derive or receive pleasure from; get enjoyment from; take pleasure in
	taste appreciatively
	give taste to
	have flavor; taste of something