caw vs emit

caw is a noun but emit is not a noun.

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

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

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

caw (noun)	emit (noun)
the sound made by corvine birds

caw (verb)	emit (verb)
utter a cry, characteristic of crows, rooks, or ravens	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.