discharge vs eject

discharge is a noun but eject is not a noun.

Word	Noun	Adjective	Verb	Adverb
discharge	Yes	No	Yes	No
eject	No	No	Yes	No

As verbs, discharge and eject are synonyms defined as:

Other synonyms of discharge include exhaust, expel, release.

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

Other hyponyms of discharge include force out, squeeze out, squirt, disperse, dot, dust, scatter, sprinkle, play, volley.

discharge (noun)	eject (noun)
the act of discharging a gun
the termination of someone's employment (leaving them free to depart)
a formal written statement of relinquishment
the act of venting
the sudden giving off of energy
the pouring forth of a fluid
electrical conduction through a gas in an applied electric field
any of several bodily processes by which substances go out of the body
a substance that is emitted or released

discharge (verb)	eject (verb)
eliminate (a substance)	eliminate (a substance)
become empty or void of its content	cause to come out in a squirt
pronounce not guilty of criminal charges	put out or expel from a place
release from military service	leave an aircraft rapidly, using an ejection seat or capsule
cause to go off
go off or discharge
pour forth or release
remove the charge from
remove (cargo, people, etc.) from and leave
complete or carry out
free from obligations or duties