dice cup vs dice box

dice cup and dice box both are nouns.

Word	Noun	Adjective	Verb	Adverb
dice cup	Yes	No	No	No
dice box	Yes	No	No	No

As nouns, dice cup and dice box are synonyms defined as:

dice cup and dice box: a small container (open at one end) in which dice are shaken by hand and from which they are thrown

dice cup (noun)	dice box (noun)
a small container (open at one end) in which dice are shaken by hand and from which they are thrown	a small container (open at one end) in which dice are shaken by hand and from which they are thrown