accolade vs medallion

accolade and medallion both are nouns.

Word	Noun	Adjective	Verb	Adverb
accolade	Yes	No	No	No
medallion	Yes	No	No	No

As nouns, medallion is a hyponym of accolade; that is, medallion is a word with a more specific, narrower meaning than accolade:

accolade: a tangible symbol signifying approval or distinction
medallion: an award for winning a championship or commemorating some other event

accolade (noun)	medallion (noun)
a tangible symbol signifying approval or distinction	an award for winning a championship or commemorating some other event
	an emblem indicating that a taxicab is registered
	a circular helping of food (especially a boneless cut of meat)
	a circular helping of food (especially a boneless cut of meat) "medallions of veal"
	any of various large ancient Greek coins