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| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | fully awake |
| Synonyms: | active, alert, all ears, attentive, bright, bright-eyed and bushy-tailed, bright-eyed and bushy-tailed, fast on the draw, heads up, intelligent, lively, on guard, on one's toes, on one's toes, on the ball, on the ball, on the job, on the lookout, psyched up, quick, ready, sharp, spirited, vigilant, watchful, wide-eyed, wired |
| Main Entry: | bright |
| Part of Speech: | adjective |
| Definition: | intelligent |
| Synonyms: | Einstein, acute, advanced, alert, astute, aware, brainy, brilliant, clear-headed, clever, discerning, eggheaded, having smarts, ingenious, inventive, keen, knowing, precocious, quick, quick-witted, sharp, smart, whiz kid, wide-awake |
| Antonyms: | dull, stupid, unaware, unintelligent |
| Main Entry: | nimble |
| Part of Speech: | adjective |
| Definition: | dexterous, smart |
| Synonyms: | active, adept, adroit, agile, alert, bright, brisk, clever, deft, handy, light, lissome, lithe, lively, proficient, prompt, quick, quick-witted, ready, skillful, sprightly, spry, swift, vigilant, wide-awake |
| Antonyms: | awkward, clumsy, lumbering, slow, undexterous, unhandy |
| Main Entry: | observant |
| Part of Speech: | adjective |
| Definition: | alert, watchful |
| Synonyms: | advertent, alive, attentive, bright, clear-sighted, comprehending, considering, contemplating, correct, deducing, detecting, discerning, discovering, discriminating, eager, eagle-eyed, heedful, intelligent, intentive, interested, keen, mindful, not missing a trick, obedient, observative, on one's toes, on the ball, penetrating, perceptive, questioning, quick, regardful, searching, sensitive, sharp, sharp-eyed, surveying, understanding, vigilant, wide-awake |
| Antonyms: | careless, inattentive, indifferent, thoughtless, unaware, unmindful, unobservant, unwatchful |
| Main Entry: | prompt |
| Part of Speech: | adjective |
| Definition: | early, responsive |
| Synonyms: | alert, apt, brisk, eager, efficient, expeditious, immediate, instant, instantaneous, on the ball, on the button, on the dot, on the nose, on time, precise, punctual, quick, rapid, ready, smart, speedy, swift, timely, unhesitating, vigilant, watchful, wide-awake, willing |
| Antonyms: | late, negligent, slow, tardy |
| Main Entry: | sleepless |
| Part of Speech: | adjective |
| Definition: | insomniac, restless |
| Synonyms: | active, alert, antsy*, anxious, bustling, edgy, fidgeting, fidgety, jumpy, nervous, on edge, strung out, tossing and turning, troubled, unsettled, wakeful, wide-awake, wired, worried |
* = informal/non-formal usage
| Main Entry: | vigilant |
| Part of Speech: | adjective |
| Definition: | careful, watchful |
| Synonyms: | acute, agog, alert, anxious, attentive, aware, cautious, circumspect, guarded, keen, looking for, looking to, observant, on alert, on guard, on the ball, on the job, on the lookout, on the qui vive, on toes, open-eyed, sharp, sleepless, unsleeping, waiting on, wakeful, wary, wide-awake, with eyes peeled, with weather eye open |
| Antonyms: | careless, impulsive, inattentive, indiscreet, negligent |
| Main Entry: | wakeful |
| Part of Speech: | adjective |
| Definition: | alert, restless |
| Synonyms: | alive, astir, attentive, careful, heedful, insomniac, insomnious, observant, on guard, on the alert, on the lookout, on the qui vive, sleepless, unsleeping, vigilant, waking, wary, watchful, wide-awake |
| Antonyms: | sleepy, unaware |
| Main Entry: | wary |
| Part of Speech: | adjective |
| Definition: | careful, cautious |
| Synonyms: | alert, attentive, cagey, calculating, canny, chary, circumspect, considerate, discreet, distrustful, doubting, frugal, gingerly, guarded, handling with kid gloves, heedful, keeping on one's toes, leery, on guard, on the lookout, on the qui vive, provident, prudent, safe, saving, sly, sparing, suspicious, thinking twice, thrifty, unwasteful, vigilant, walking on eggs, watchful, watching one's step, watching out, wide-awake |
| Notes: | to be wary is to be cautious or watchful; weary means fatigued or tired |
| Antonyms: | careless, foolish, heedless, incautious, indiscreet, rash, reckless |
Roget's 21st Century Thesaurus, Third Edition
Copyright © 2013 by the Philip Lief Group.
Cite This Source
Copyright © 2013 by the Philip Lief Group.
Cite This Source
Copyright © 2013 Dictionary.com, LLC. All rights reserved.
