emit vs emitter

emit is not a noun while emitter is a noun.

Word	Noun	Adjective	Verb	Adverb
emit	No	No	Yes	No
emitter	Yes	No	No	No

emit (noun)	emitter (noun)
	the electrode in a transistor where electrons originate

emit (verb)	emitter (verb)
expel (gases or odors)
express audibly; utter sounds (not necessarily words)
give off, send forth, or discharge; as of light, heat, or radiation, vapor, etc.