ken vs sight

ken and sight both are nouns.

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

As nouns, ken and sight are synonyms defined as:

ken (noun)	sight (noun)
range of what one can know or understand	the act of looking or seeing or observing
the range of vision	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

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