prison cell vs sweatbox

prison cell and sweatbox both are nouns.

Word	Noun	Adjective	Verb	Adverb
prison cell	Yes	No	No	No
sweatbox	Yes	No	No	No

As nouns, sweatbox is a hyponym of prison cell; that is, sweatbox is a word with a more specific, narrower meaning than prison cell:

Other hyponyms of prison cell include bullpen, detention cell, detention centre, cooler, tank, dungeon, guardroom, hold, keep.

prison cell (noun)	sweatbox (noun)
a room where a prisoner is kept	a device that causes tobacco leaves or fruit or hides to sweat
	small or narrow cell