1
quick(sharp, bright, lively, active, alert)
1
ready(sharp, bright, lively, active, alert)
1
recommendation(information, sign, notice, alert, hint)
1
scope(verb, see, mind, notice, spot)
1
sharp(bright, lively, alert, aware, attentive)
1
shotgun(verb, see, mind, notice, spot)
1
spirited(sharp, bright, lively, active, alert)
1
spot(verb, mind, notice, avoid, attend)
1
spy(verb, mind, notice, spot, avoid)
1
suggestion(information, sign, notice, alert, hint)
1
switched on(expression, sharp, bright, lively, active)
1
threat(information, sign, notice, alert, hint)
1
tip(information, sign, notice, alert, caution)
1
tip-off(information, sign, notice, alert, hint)
1
vigilant(sharp, bright, lively, active, alert)
1
wary(sharp, bright, lively, alert, attentive)
1
watch-it(noun, information, sign, notice, alert)
1
watch out(verb, expression, phrasal verb, see, mind)
1
watchful(sharp, bright, lively, alert, aware)
1
wide-awake(adjective, sharp, bright, lively, alert)
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APASmart Define. (2011). heads up thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/heads_up/thesaurus/synonyms
ChicagoSmart Define. 2011. "heads up thesaurus" https://smartdefine.org/heads_up/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2011, heads up thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/heads_up/thesaurus/synonyms>.
MLASmart Define. "heads up thesaurus" 24 May 2011. Web. 23 September 2026. <https://smartdefine.org/heads_up/thesaurus/synonyms>