expel vs emit

expel and emit both are verbs.

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

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

expel (verb)	emit (verb)
eliminate (a substance)	expel (gases or odors)
cause to flee	express audibly; utter sounds (not necessarily words)
force to leave or move out	give off, send forth, or discharge; as of light, heat, or radiation, vapor, etc.
remove from a position or office