voice vs voicer

voice and voicer both are nouns.

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

voice (noun)	voicer (noun)
a means or agency by which something is expressed or communicated	a speaker who voices an opinion
the distinctive quality or pitch or condition of a person's speech	someone who regulates the tone of organ pipes
the ability to speak
the sound made by the vibration of vocal folds modified by the resonance of the vocal tract
expressing in coherent verbal form
the melody carried by a particular voice or instrument in polyphonic music
something suggestive of speech in being a medium of expression
A term used in phonetics and phonology to characterize speech sounds, with sounds described as either voiceless (unvoiced) or voiced.
a sound suggestive of a vocal utterance
an advocate who represents someone else's policy or purpose
(metonymy) a singer
(linguistics) the grammatical relation (active or passive) of the grammatical subject of a verb to the action that the verb denotes

voice (verb)	voicer (verb)
give voice to
utter with vibrating vocal chords