broadcast medium vs mass medium

broadcast medium and mass medium both are nouns.

Word	Noun	Adjective	Verb	Adverb
broadcast medium	Yes	No	No	No
mass medium	Yes	No	No	No

As nouns, mass medium is a hypernym of broadcast medium; that is, mass medium is a word with a broader meaning than broadcast medium:

broadcast medium: a medium that disseminates via telecommunications
mass medium: (usually plural) transmissions that are disseminated widely to the public

Other hypernyms of broadcast medium include medium.

broadcast medium (noun)	mass medium (noun)
a medium that disseminates via telecommunications	(usually plural) transmissions that are disseminated widely to the public