emit vs sparkle

emit is not a noun while sparkle is a noun.

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

As verbs, sparkle is a hyponym of emit; that is, sparkle is a word with a more specific, narrower meaning than emit:

emit: give off, send forth, or discharge; as of light, heat, or radiation, vapor, etc.
sparkle: emit or produce sparks

Other hyponyms of emit include effuse, reflect, shine, spark, radiate, scintillate, fume, smoke, reek, shoot, ray, steam.

emit (noun)	sparkle (noun)
	the quality of shining with a bright reflected light
	merriment expressed by a brightness or gleam or animation of countenance
	the occurrence of a small flash or spark

emit (verb)	sparkle (verb)
expel (gases or odors)	become bubbly or frothy or foaming
express audibly; utter sounds (not necessarily words)	be lively or brilliant or exhibit virtuosity
give off, send forth, or discharge; as of light, heat, or radiation, vapor, etc.	reflect brightly
	emit or produce sparks