emission vs emit

emission is a noun but emit is not a noun.

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

emission (noun)	emit (noun)
the act of emitting; causing to flow forth
the occurrence of a flow of water (as from a pipe)
the release of electrons from parent atoms
any of several bodily processes by which substances go out of the body
a substance that is emitted or released

emission (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.