call box vs kiosk

call box and kiosk both are nouns.

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

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

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

call box (noun)	kiosk (noun)
booth for using a telephone	small area set off by walls for special use
a numbered compartment in a post office where mail is put to be called for