knightly vs knight

knightly is not a noun while knight is a noun.

Word	Noun	Adjective	Verb	Adverb
knightly	No	Yes	No	No
knight	Yes	No	Yes	No

knightly (noun)	knight (noun)
	a chessman shaped to resemble the head of a horse; can move two squares horizontally and one vertically (or vice versa)
	originally a person of noble birth trained to arms and chivalry; today in Great Britain a person honored by the sovereign for personal merit

knightly (adjective)	knight (adjective)
being attentive to women like an ideal knight
characteristic of the time of chivalry and knighthood in the Middle Ages

knightly (verb)	knight (verb)
	raise (someone) to knighthood