release vs ending

release and ending both are nouns.

Word	Noun	Adjective	Verb	Adverb
release	Yes	No	Yes	No
ending	Yes	No	No	No

As nouns, ending is a hypernym of release; that is, ending is a word with a broader meaning than release:

release: the termination of someone's employment (leaving them free to depart)
ending: the act of ending something

Other hypernyms of release include conclusion, termination.

As nouns, ending is a hypernym of release; that is, ending is a word with a broader meaning than release:

Other hypernyms of release include conclusion, termination.

release (noun)	ending (noun)
activity that frees or expresses creative energy or emotion	the act of ending something
the act of liberating someone or something	the end of a word (a suffix or inflectional ending or final morpheme)
the termination of someone's employment (leaving them free to depart)	the last section of a communication
the act of allowing a fluid to escape	event whose occurrence ends something
a formal written statement of relinquishment	the point in time at which something ends
(music) the act or manner of terminating a musical phrase or tone
merchandise issued for sale or public showing (especially a record or film)
a device that when pressed will release part of a mechanism
an announcement distributed to members of the press in order to supplement or replace an oral presentation
a legal document evidencing the discharge of a debt or obligation
euphemistic expressions for death
a process that liberates or discharges something

release (verb)	ending (verb)
generate and separate from cells or bodily fluids
eliminate (a substance)
make (assets) available
prepare and issue for public distribution or sale
release, as from one's grip
let (something) fall or spill from a container
release (gas or energy) as a result of a chemical reaction or physical decomposition
part with a possession or right
grant freedom to; free from confinement
make (information) available for publication