ending vs wipeout

ending and wipeout both are nouns.

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

As nouns, wipeout is a hyponym of ending; that is, wipeout is a word with a more specific, narrower meaning than ending:

ending (noun)	wipeout (noun)
the act of ending something	a spill in some sport (as a fall from a bicycle or while skiing or being capsized on a surfboard)
the end of a word (a suffix or inflectional ending or final morpheme)	an event that completely destroys something
the last section of a communication
event whose occurrence ends something
the point in time at which something ends