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on one's toes
adjective as in alert
Strongest matches
adjective as in attentive
adjective as in mindful
Strongest matches
adjective as in observant
Weak matches
- advertent
- alive
- bright
- clear-sighted
- comprehending
- considering
- contemplating
- correct
- deducing
- detecting
- discovering
- eager
- eagle-eyed
- heedful
- intentive
- interested
- keen
- not missing a trick
- obedient
- observative
- on the ball
- penetrating
- questioning
- quick
- regardful
- searching
- sensitive
- sharp
- sharp-eyed
- surveying
- understanding
- wide-awake
adjective as in on one's guard
adjective as in on the ball
adjective as in open-eyed
adjective as in watchful
Strong match
adjective as in wide-awake
adverb as in on guard
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From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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