risk vs probability

risk and probability both are nouns.

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

As nouns, probability is a hypernym of risk; that is, probability is a word with a broader meaning than risk:

risk: the probability of being exposed to an infectious agent
probability: a measure of how likely it is that some event will occur; a number expressing the ratio of favorable cases to the whole number of cases possible

Other hypernyms of risk include chance.

As nouns, probability is a hypernym of risk; that is, probability is a word with a broader meaning than risk:

risk: the probability of becoming infected given that exposure to an infectious agent has occurred
probability: a measure of how likely it is that some event will occur; a number expressing the ratio of favorable cases to the whole number of cases possible

Other hypernyms of risk include chance.

risk (noun)	probability (noun)
a venture undertaken without regard to possible loss or injury	the quality of being probable; a probable event or the most probable event
the probability of being exposed to an infectious agent	a measure of how likely it is that some event will occur; a number expressing the ratio of favorable cases to the whole number of cases possible
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)	probability (verb)
expose to a chance of loss or damage
take a risk in the hope of a favorable outcome