choky vs prison

choky and prison both are nouns.

Word	Noun	Adjective	Verb	Adverb
choky	Yes	Yes	No	No
prison	Yes	No	No	No

As nouns, prison is a hypernym of choky; that is, prison is a word with a broader meaning than choky:

choky: British slang (dated) for a prison
prison: a correctional institution where persons are confined while on trial or for punishment

Other hypernyms of choky include prison house.

choky (noun)	prison (noun)
British slang (dated) for a prison	a correctional institution where persons are confined while on trial or for punishment
	a prisonlike situation; a place of seeming confinement

choky (adjective)	prison (adjective)
so tight as to tend to choke