The condition of being unable to happen or to be achieved.
Uncertainty is defined as doubt.
The fact of being likely to happen; probability
Find another word for unlikelihood. In this page you can discover 12 synonyms, antonyms, idiomatic expressions, and related words for unlikelihood, like: a snowball's chance in hell, impossibility, improbability, doubtfulness, inconceivability, remote possibility, a ghost of a chance, uncertainty, unlikeliness, likelihood and implausibility.