Synonyms and related words :
abnormality, anomaly, bare possibility, conversation piece, curio, curiosity, dark horse, exception, fighting chance, gambling chance, hardly a chance, hundred-to-one shot, inexpectance, inexpectancy, inexpectation, little chance, little opportunity, long odds, long shot, museum piece, no expectation, nonesuch, nonexpectation, oddity, off chance, outside chance, poor bet, poor lookout, poor possibility, poor prospect, prodigiosity, prodigy, rarity, remote possibility, slim chance, small chance, strange thing, the unforeseen, the unlooked-for, unanticipation, unexpectedness, unforeseeableness, unlikelihood, unpredictability, unpredictableness, unpreparedness, unreadiness