depressor vs nervus

depressor and nervus both are nouns.

Word	Noun	Adjective	Verb	Adverb
depressor	Yes	No	No	No
nervus	Yes	No	No	No

As nouns, nervus is a hypernym of depressor; that is, nervus is a word with a broader meaning than depressor:

depressor: any nerve whose activity tends to reduce the activity or tone of the body part it serves
nervus: any bundle of nerve fibers running to various organs and tissues of the body

Other hypernyms of depressor include nerve.

depressor (noun)	nervus (noun)
a device used by physician to press a part down or aside	any bundle of nerve fibers running to various organs and tissues of the body
any skeletal muscle that draws a body part down
any nerve whose activity tends to reduce the activity or tone of the body part it serves