tribune vs defender

tribune and defender both are nouns.

Word	Noun	Adjective	Verb	Adverb
tribune	Yes	No	No	No
defender	Yes	No	No	No

As nouns, defender is a hypernym of tribune; that is, defender is a word with a broader meaning than tribune:

tribune: (ancient Rome) an official elected by the plebeians to protect their interests
defender: a person who cares for persons or property

Other hypernyms of tribune include guardian, protector, shielder.

tribune (noun)	defender (noun)
the apse of a Christian church that contains the bishop's throne	a person who cares for persons or property
(ancient Rome) an official elected by the plebeians to protect their interests	a fighter who holds out against attack