Air Medal vs decoration

Air Medal and decoration both are nouns.

Word	Noun	Adjective	Verb	Adverb
Air Medal	Yes	No	No	No
decoration	Yes	No	No	No

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

Air Medal: a United States Air Force decoration for meritorious achievement while participating in an aerial flight
decoration: an award for winning a championship or commemorating some other event

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

Air Medal (noun)	decoration (noun)
a United States Air Force decoration for meritorious achievement while participating in an aerial flight	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