chance
noun
a possibility due to a favorable combination of circumstances
“the holiday gave us the opportunity to visit Washington”
“now is your chance”
Synonymsopportunityan unknown and unpredictable phenomenon that causes an event to result one way rather than another
“bad luck caused his downfall”
“we ran into each other by pure chance”
a risk involving danger
“you take a chance when you let her drive”
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 that an unbiased coin will fall with the head up is 0.5”
“if that phone call is for me, chances are it's my wife”
Synonymsprobabilitythe possibility of future success
“his prospects as a writer are excellent”
Synonymsprospect
verb
be the case by chance
“I chanced to meet my old friend in the street”
take a risk in the hope of a favorable outcome
“When you buy these stocks you are gambling”
come upon, as if by accident; meet with
“We find this idea in Plato”
“I happened upon the most wonderful bakery not very far from here”
adjective
occurring or appearing or singled out by chance
“seek help from casual passers-by”
“a casual meeting”
Synonymscasual
Source: WordNet 3.1, Princeton University