emitter vs emit

emitter is a noun but emit is not a noun.

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

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

emitter (verb)	emit (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.