tenor vs tenor voice

tenor and tenor voice both are nouns.

Word	Noun	Adjective	Verb	Adverb
tenor	Yes	Yes	No	No
tenor voice	Yes	No	No	No

As nouns, tenor and tenor voice are synonyms defined as:

tenor (noun)	tenor voice (noun)
the pitch range of the highest male voice	the adult male singing voice above baritone
the general meaning or substance of an utterance
a settled or prevailing or habitual course of a person's life
the adult male singing voice above baritone
an adult male with a tenor voice

tenor (adjective)	tenor voice (adjective)
of or close in range to the highest natural adult male voice
(of a musical instrument) intermediate between alto and baritone or bass