Medal of Honor vs decoration

Medal of Honor and decoration both are nouns.

Word	Noun	Adjective	Verb	Adverb
Medal of Honor	Yes	No	No	No
decoration	Yes	No	No	No

As nouns, decoration is a hypernym of Medal of Honor; that is, decoration is a word with a broader meaning than Medal of Honor:

Medal of Honor: the highest U.S. military decoration awarded for bravery and valor in action `above and beyond the call of duty'
decoration: an award for winning a championship or commemorating some other event

Other hypernyms of Medal of Honor include laurel wreath, medal, medallion, palm, ribbon.

Medal of Honor (noun)	decoration (noun)
the highest U.S. military decoration awarded for bravery and valor in action `above and beyond the call of duty'	the act of decorating something (in the hope of making it more attractive)
	something used to beautify
	an award for winning a championship or commemorating some other event