sight vs perceive

sight is a noun but perceive is not a noun.

Word	Noun	Adjective	Verb	Adverb
sight	Yes	No	Yes	No
perceive	No	No	Yes	No

As verbs, perceive is a hypernym of sight; that is, perceive is a word with a broader meaning than sight:

Other hypernyms of sight include comprehend.

sight (noun)	perceive (noun)
the act of looking or seeing or observing
the ability to see; the visual faculty
an instance of visual perception
the range of vision
a range of mental vision
a place of interest, especially to visitors
anything that is seen
(often followed by `of') a large number or amount or extent

sight (verb)	perceive (verb)
catch sight of; to perceive with the eyes	become conscious of
take aim by looking through the sights of a gun (or other device)	to become aware of through the senses