medallion vs coin

medallion and coin both are nouns.

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

As nouns, coin is a hypernym of medallion; that is, coin is a word with a broader meaning than medallion:

medallion (noun)	coin (noun)
an award for winning a championship or commemorating some other event	a flat metal piece (usually a disc) used as money
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

medallion (verb)	coin (verb)
	form by stamping, punching, or printing
	make up