dismount vs discontinuation

dismount and discontinuation both are nouns.

Word	Noun	Adjective	Verb	Adverb
dismount	Yes	No	Yes	No
discontinuation	Yes	No	No	No

As nouns, discontinuation is a hypernym of dismount; that is, discontinuation is a word with a broader meaning than dismount:

dismount: the act of dismounting (a horse or bike etc.)
discontinuation: the act of discontinuing or breaking off; an interruption (temporary or permanent)

Other hypernyms of dismount include discontinuance.

dismount (noun)	discontinuation (noun)
the act of dismounting (a horse or bike etc.)	the act of discontinuing or breaking off; an interruption (temporary or permanent)

dismount (verb)	discontinuation (verb)
alight from (a horse)