prompt box vs kiosk

prompt box and kiosk both are nouns.

Word	Noun	Adjective	Verb	Adverb
prompt box	Yes	No	No	No
kiosk	Yes	No	No	No

As nouns, kiosk is a hypernym of prompt box; that is, kiosk is a word with a broader meaning than prompt box:

prompt box: a booth projecting above the floor in the front of a stage where the prompter sits; opens toward the performers on stage
kiosk: small area set off by walls for special use

Other hypernyms of prompt box include booth, cubicle, stall.

prompt box (noun)	kiosk (noun)
a booth projecting above the floor in the front of a stage where the prompter sits; opens toward the performers on stage	small area set off by walls for special use