dice vs six

dice and six both are nouns.

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

As nouns, six is a hyponym of dice; that is, six is a word with a more specific, narrower meaning than dice:

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

Other hyponyms of dice include five-spot, five, four-spot, four, one-spot, six-spot, D4.

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

dice (adjective)	six (adjective)
	denoting a quantity consisting of six items or units

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