trumpeter vs courier

trumpeter and courier both are nouns.

Word	Noun	Adjective	Verb	Adverb
trumpeter	Yes	No	No	No
courier	Yes	No	No	No

As nouns, courier is a hypernym of trumpeter; that is, courier is a word with a broader meaning than trumpeter:

Other hypernyms of trumpeter include messenger.

trumpeter (noun)	courier (noun)
large gregarious crane-like bird of the forests of South America having glossy black plumage and a loud prolonged cry; easily domesticated	a person who carries a message
large pure white wild swan of western North America having a sonorous cry
a musician who plays the trumpet or cornet
(formal) a person who announces important news