| Main Entry: | alert |
| Part of Speech: | adjective |
| Definition: | attentive, lively |
Synonyms: |
active, all ears, bright, cagey, careful, circumspect, clever, fast on the draw, good hands, heads up, heedful, hip, intelligent, jazzed, observant, on guard, on one's toes, on the ball, on the job, on the lookout, on the qui vive, perceptive, psyched up, quick, ready, sharp, spirited, switched on, vigilant, wary, watchful, wide-awake, wired, wise, with it |
Antonyms: |
asleep, drowsy, inattentive, lethargic, sluggish, unobservant, weary |
| 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 |
| 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 |
| Main Entry: | watchful |
| Part of Speech: | adjective |
| Definition: | on the lookout |
Synonyms: |
alert, all ears, attentive, careful, cautious, chary, circumspect, glued, guarded, heedful, hooked, keen, not missing a trick, observant, on guard, on one's toes, on the ball, on the job, on the qui vive, on the watch, open-eyed, prepared, ready, see after, see to, suspicious, unsleeping, vigilant, wakeful, wary, wide-awake, with eyes peeled |
Antonyms: |
inattentive, negligent |