garbage vs message

garbage and message both are nouns.

Word	Noun	Adjective	Verb	Adverb
garbage	Yes	No	No	No
message	Yes	No	Yes	No

As nouns, message is a hypernym of garbage; that is, message is a word with a broader meaning than garbage:

Other hypernyms of garbage include content, subject matter, substance.

garbage (noun)	message (noun)
a receptacle where waste can be discarded	content communicating a message; what something is about
a worthless message	a communication (usually brief) that is written or spoken or signaled
food that is discarded (as from a kitchen)