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Thesaurus / on the alert
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See definition of on the alert on Dictionary.com
  • as inunsleeping
  • as inwakeful

synonyms for on the alert

  • alive
  • astir
  • attentive
  • awake
  • careful
  • heedful
  • insomniac
  • insomnious
  • observant
  • on guard
  • on the lookout
  • on the qui vive
  • sleepless
  • vigilant
  • waking
  • wary
  • watchful
  • wide-awake
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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How to use on the alert in a sentence

Sleek finds it far harder work than fortune-making; but he pursues his Will-o'-the-Wisp with untiring energy.
THE PIT TOWN CORONET, VOLUME I (OF 3)CHARLES JAMES WILLS
It was Carmena, every nerve of her loyal nature on the alert to baffle this pursuer of Alessandro and Ramona.
RAMONAHELEN HUNT JACKSON
You never know when you are going to stumble upon a jewel in the most out-of-the-way corner.
MUSIC-STUDY IN GERMANYAMY FAY
Mr. Slocum was not educated in a university, and his life has been in by-paths, and out-of-the-way places.
THE BOOK OF ANECDOTES AND BUDGET OF FUN;VARIOUS
I drew back from the rim of Writing-On-the-Stone, that set of whispered phrases echoing in my ears.
RAW GOLDBERTRAND W. SINCLAIR
Then, his hand resting on the handle of the cab-door, this expression suddenly changed to one of alert suspicion.
DOPESAX ROHMER
He is small, alert, brimful of jokes and of years; seventy they say, but he neither looks it nor acts it.
GALLIPOLI DIARY, VOLUME IIAN HAMILTON
But his eyes and ears were alert, and he was the first to hear the advent of a large body of horses along the main road.
THE RED YEARLOUIS TRACY
The almost lazy naturalness and simplicity faded gradually out of it, revealing the alert and seductive woman of the world.
BELLA DONNAROBERT HICHENS
His perception was still exceptionally alert, its acuteness left over, apparently, from the earlier days of pain and jealousy.
THE WAVEALGERNON BLACKWOOD
SYNONYM OF THE DAY
OCTOBER 26, 1985
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capacitor

WORDS RELATED TO ON THE ALERT

  • alive
  • astir
  • attentive
  • awake
  • careful
  • heedful
  • insomniac
  • insomnious
  • observant
  • on guard
  • on the alert
  • on the lookout
  • on the qui vive
  • sleepless
  • vigilant
  • waking
  • wary
  • watchful
  • wide-awake
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.