volley vs emit

volley is a noun but emit is not a noun.

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

As verbs, emit is a hypernym of volley; that is, emit is a word with a broader meaning than volley:

Other hypernyms of volley include let loose, let out, utter.

volley (noun)	emit (noun)
rapid simultaneous discharge of firearms
a tennis return made by hitting the ball before it bounces

volley (verb)	emit (verb)
utter rapidly	expel (gases or odors)
make a volley	express audibly; utter sounds (not necessarily words)
discharge in, or as if in, a volley	give off, send forth, or discharge; as of light, heat, or radiation, vapor, etc.
hit before it touches the ground
be dispersed in a volley