four vs dice

four and dice both are nouns.

Word	Noun	Adjective	Verb	Adverb
four	Yes	Yes	No	No
dice	Yes	No	Yes	No

As nouns, dice is a hypernym of four; that is, dice is a word with a broader meaning than four:

four: a playing card or domino or die whose upward face shows four pips
dice: a small cube with 1 to 6 spots on the six faces; used in gambling to generate random numbers

Other hypernyms of four include die, domino, spot.

four (noun)	dice (noun)
a playing card or domino or die whose upward face shows four pips	a small cube with 1 to 6 spots on the six faces; used in gambling to generate random numbers
the cardinal number that is the sum of three and one

four (adjective)	dice (adjective)
being one more than three

four (verb)	dice (verb)
	play dice
	cut into cubes