knightliness vs chivalry

knightliness and chivalry both are nouns.

Word	Noun	Adjective	Verb	Adverb
knightliness	Yes	No	No	No
chivalry	Yes	No	No	No

As nouns, knightliness and chivalry are synonyms defined as:

knightliness and chivalry: the medieval principles governing knighthood and knightly conduct

knightliness (noun)	chivalry (noun)
the medieval principles governing knighthood and knightly conduct	courtesy towards women
	the medieval principles governing knighthood and knightly conduct