Medaille Militaire vs medallion

Medaille Militaire and medallion both are nouns.

Word	Noun	Adjective	Verb	Adverb
Medaille Militaire	Yes	No	No	No
medallion	Yes	No	No	No

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

Medaille Militaire: a French military decoration
medallion: an award for winning a championship or commemorating some other event

Other hypernyms of Medaille Militaire include decoration, laurel wreath, medal, palm, ribbon.

Medaille Militaire (noun)	medallion (noun)
a French military decoration	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