93 entries under warning topic. ×

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handwriting on the wall(expression, idiom, sign, omen)
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housedog
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indication of locality(expression, idiom)
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lookout
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misgiving(sign, portent)
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mole
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notification(sign, notice, alert, caution, alarm)
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patrol
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patrolman
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picket
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plainclothesman
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prenotion(sign, portent)
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prescience
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presentiment(mark, light, sign, notice)
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rear guard(expression, idiom)
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scout
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scramble(alert, caution, bell, siren)
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sentinel
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sentry
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sinking feeling(expression, sign, omen)
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APASmart Define. (2016). signal thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/signal/thesaurus/synonyms
ChicagoSmart Define. 2016. "signal thesaurus" https://smartdefine.org/signal/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, signal thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/signal/thesaurus/synonyms>.
MLASmart Define. "signal thesaurus" 1 March 2016. Web. 29 September 2026. <https://smartdefine.org/signal/thesaurus/synonyms>