random variable vs chance variable

random variable and chance variable both are nouns.

Word	Noun	Adjective	Verb	Adverb
random variable	Yes	No	No	No
chance variable	Yes	No	No	No

As nouns, random variable and chance variable are synonyms defined as:

Other synonyms of random variable include stochastic variable, variant, variate.

random variable (noun)	chance variable (noun)
a variable quantity that is random	a variable quantity that is random