knightly vs mediaeval

knightly and mediaeval both are adjectives.

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

As adjectives, knightly and mediaeval are synonyms defined as:

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

Other synonyms of knightly include chivalric, medieval.

knightly (adjective)	mediaeval (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