risk vs crapshoot

risk and crapshoot both are nouns.

Word	Noun	Adjective	Verb	Adverb
risk	Yes	No	Yes	No
crapshoot	Yes	No	No	No

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

Other hyponyms of risk include chance, gamble.

risk (noun)	crapshoot (noun)
a venture undertaken without regard to possible loss or injury	playing craps
the probability of being exposed to an infectious agent	a risky and uncertain venture
the probability of becoming infected given that exposure to an infectious agent has occurred
a source of danger; a possibility of incurring loss or misfortune

risk (verb)	crapshoot (verb)
expose to a chance of loss or damage
take a risk in the hope of a favorable outcome