| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | chance |
| Synonyms: | accidental, casual, chancy, coincidental, contingent, fortuitous, incalculable, incidental, lucky, odd, uncertain, variable |
| Antonyms: | certain, designed, planned, sure |
| Main Entry: | casual |
| Part of Speech: | adjective |
| Definition: | chance, random |
| Synonyms: | accidental, adventitious, by chance, contingent, erratic, extemporaneous, extempore, fluky, fortuitous, impromptu, improvised, impulsive, incidental, infrequent, irregular, occasional, odd, offhand, serendipitous, spontaneous, uncertain, unexpected, unforeseen, unintentional, unplanned, unpremeditated |
| Antonyms: | deliberate, painstaking, planned, premeditated |
| Main Entry: | chance |
| Part of Speech: | adjective |
| Definition: | accidental, unforeseeable |
| Synonyms: | adventitious, at random, casual, contingent, fluky, fortuitous, fortunate, happy, inadvertent, incidental, lucky, odd, offhand, unforeseen, unintentional, unlooked for, unplanned |
| Antonyms: | designed, foreseeable, planned, understood |
| Main Entry: | chancy |
| Part of Speech: | adjective |
| Definition: | dangerous, risky |
| Synonyms: | capricious, contingent, dicey, erratic, fluctuant, fluky, hazardous, iffy, incalculable, precarious, problematic, problematical, rocky, speculative, ticklish, touchy, tricky, uncertain, unpredictable, unsound, whimsical |
| Antonyms: | certain, not dangerous, safe, secure, sure, tried |
| Main Entry: | coincidental |
| Part of Speech: | adjective |
| Definition: | accidental |
| Synonyms: | casual, chance, circumstantial, fluky, fortuitous, incidental, unintentional, unplanned |
| Antonyms: | decided, deliberate, designed, planned |
| Main Entry: | contingent |
| Part of Speech: | adjective |
| Definition: | conditional; possible |
| Synonyms: | accidental, casual, chance, controlled by, dependent, fluky, fortuitous, haphazard, incidental, likely, odd, probable, probably, random, subject to, unanticipated, uncertain, unexpected, unforeseeable, unforeseen, unpredictable |
| Antonyms: | certain, definite, real, sure, truthful, unconditional |
| Main Entry: | fortuitous |
| Part of Speech: | adjective |
| Definition: | lucky, accidental |
| Synonyms: | arbitrary, casual, chance, contingent, fluke, fluky, fortunate, haphazard, happy, incidental, luck in, luck out, lucky-dog, odd, providential, random, serendipitous, unforeseen, unplanned |
| Antonyms: | calculated, deliberate, designed, intentional, planned, unlucky |
| Main Entry: | hit-or-miss |
| Part of Speech: | adjective |
| Definition: | random |
| Synonyms: | accidental, aimless, arbitrary, casual, chance, contingent, fluky, fortuitous, haphazard, incidental, irregular, slipshod, trial-and error, unplanned, unpremeditated |
| Main Entry: | odd |
| Part of Speech: | adjective |
| Definition: | miscellaneous, various |
| Synonyms: | accidental, casual, chance, contingent, different, fluky, fortuitous, fragmentary, incidental, irregular, occasional, odd-lot, periodic, random, seasonal, sundry, varied |
| Antonyms: | like, similar, unvaried |