Dictionary and thesaurus definitions of uncertainty and risk Table below it appears that ‘uncertainty’ is a generic term, while ‘risk’ seems to be more specific. TERM UNCERTAINTY RISK Dictionary (Collins, 1979) Lacking certainty; not able to be accurately known or predicted; not precisely determined, established or decided; liable to variation; changeable. Possibility of incurring misfortune or loss; hazard; involving danger, perilous. 9 Thesaurus (Roget, 2008) Ambiguity, ambivalence, anxiety, changeableness, concern, confusion, conjecture, contingency, dilemma, disquiet, distrust, doubtfulness, guesswork, hesitancy, hesitation, incertitude, inconclusiveness, indecision, irresolution, misgiving, mistrust, mystification, oscillation, perplexity, qualm, quandary, query, reserve, scruple, scepticism, suspicion, trouble uneasiness, unpredictability, vagueness. Accident, brinksmanship, contingency, danger, exposure, fortuity, fortune, gamble, hazard, jeopardy, liability, luck, openness, opportunity, peril, possibility, prospect, speculation, uncertainty, venture, wager.