prorogation vs discontinuation

prorogation and discontinuation both are nouns.

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

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

prorogation: discontinuation of the meeting (of a legislative body) without dissolving it
discontinuation: the act of discontinuing or breaking off; an interruption (temporary or permanent)

Other hypernyms of prorogation include discontinuance.

prorogation (noun)	discontinuation (noun)
discontinuation of the meeting (of a legislative body) without dissolving it	the act of discontinuing or breaking off; an interruption (temporary or permanent)