| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | significant |
| Synonyms: | acute, apocalyptic, conclusive, critical, crucial, decisive, determinative, direful, doomful, eventful, important, inauspicious, momentous, ominous, portentous, resultful |
| Antonyms: | insignificant, unimportant |
| Main Entry: | decisive |
| Part of Speech: | adjective |
| Definition: | definite |
| Synonyms: | absolute, all out, assured, bent, certain, conclusive, crisp, critical, crucial, decided, definitive, determined, fateful, final, firm, flat out, forceful, imperative, imperious, incisive, influential, intent, litmus test, momentous, peremptory, positive, resolute, resolved, set, settled, significant, straight out, strong-minded, trenchant |
| Notes: | decided means recognizable, marked, unmistakable or definite, while decisive means having the power to determine an outcome or being conclusive |
| Antonyms: | indecisive, indefinite, procrastinating, unpositive |
| Main Entry: | direful |
| Part of Speech: | adjective |
| Definition: | fearful; horrible |
| Synonyms: | apocalyptic, appalling, awful, baleful, baneful, calamitous, dreadful, fateful, ghastly, gloomy, horrid, ill-boding, inauspicious, ominous, shocking, terrible, terrific, unlucky, unpropitious |
| Antonyms: | good, nice |
| Main Entry: | disastrous |
| Part of Speech: | adjective |
| Definition: | detrimental, devastating |
| Synonyms: | adverse, calamitous, cataclysmal, cataclysmic, catastrophic, destructive, dire, dreadful, fatal, fateful, hapless, harmful, ill-fated, ill-starred, luckless, ruinous, terrible, tragic, unfavorable, unfortunate, unlucky, unpropitious, untoward |
| Antonyms: | blessed, fortunate, lucky, miraculous, prosperous, successful, triumphant, winning, wondrous |
| Main Entry: | eventful |
| Part of Speech: | adjective |
| Definition: | significant, busy |
| Synonyms: | active, consequential, critical, crucial, decisive, exciting, fateful, full, historic, important, lively, memorable, momentous, notable, noteworthy, outstanding, remarkable, signal |
| Antonyms: | dull, insignificant, normal, ordinary, trivial, uneventful, unnoteworthy, usual |
| Main Entry: | fatal |
| Part of Speech: | adjective |
| Definition: | deadly, lethal |
| Synonyms: | baleful, baneful, calamitous, cataclysmic, catastrophic, deathly, destructive, disastrous, fateful, final, ill-fated, ill-starred, incurable, inevitable, killing, malefic, malignant, mortal, mortiferous, noxious, pernicious, pestilent, pestilential, poisonous, ruinous, terminal, virulent |
| Notes: | use fatal for something which has caused someone's death; use lethal for something which is capable of killing someone |
| Antonyms: | healthful, life-giving, nourishing, vital, wholesome |
| Main Entry: | fatal |
| Part of Speech: | adjective |
| Definition: | critical, very important |
| Synonyms: | crucial, decisive, destined, determining, doomed, fateful, final, foreordained, inevitable, predestined, unlucky |
| Notes: | use fatal for something which has caused someone's death; use lethal for something which is capable of killing someone |
| Antonyms: | trivial, unimportant, unnecessary |
| Main Entry: | inauspicious |
| Part of Speech: | adjective |
| Definition: | ominous, unpromising |
| Synonyms: | bad, baleful, baneful, black, dire, discouraging, evil, fateful, foreboding, ill-boding, ill-omened, impending, inopportune, sinister, threatening, unfavorable, unfortunate, unlucky, unpromising, unpropitious, untimely, untoward |
| Antonyms: | auspicious, favorable, fortunate, lucky, promising |
| Main Entry: | inevitable |
| Part of Speech: | adjective |
| Definition: | certain; cannot be avoided |
| Synonyms: | all locked up, assured, binding, compulsory, decided, decreed, destined, determined, doomed, fated, fateful, fixed, for certain, foreordained, imminent, impending, in the bag, ineluctable, ineludible, inescapable, inexorable, inflexible, irresistible, irrevocable, necessary, no ifs ands or buts, obligatory, ordained, pat, prescribed, settled, sure, unalterable, unavoidable, undeniable, unpreventable, without recourse |
| Antonyms: | avoidable, doubtful, escapable, fortuitous, preventable, uncertain, unlikely, unsure |