knightly vs medieval

knightly and medieval both are adjectives.

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

As adjectives, knightly and medieval are synonyms defined as:

knightly and medieval: characteristic of the time of chivalry and knighthood in the Middle Ages

Other synonyms of knightly include chivalric, mediaeval.

knightly (adjective)	medieval (adjective)
being attentive to women like an ideal knight	relating to or belonging to the Middle Ages
characteristic of the time of chivalry and knighthood in the Middle Ages	as if belonging to the Middle Ages; old-fashioned and unenlightened
	characteristic of the time of chivalry and knighthood in the Middle Ages