scintillate vs emit

scintillate and emit both are verbs.

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

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

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

Other hypernyms of scintillate include give off, give out.

scintillate (verb)	emit (verb)
be lively or brilliant or exhibit virtuosity	expel (gases or odors)
fluoresce momentarily when struck by a charged particle or high-energy photon	express audibly; utter sounds (not necessarily words)
emit or reflect light in a flickering manner	give off, send forth, or discharge; as of light, heat, or radiation, vapor, etc.
give off
reflect brightly