Sign
Sign noun - A movement of the body or limbs that expresses or emphasizes an idea or feeling.
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Synonyms for Sign
Whistle and sign are semantically related. in indication topic. In some cases you can use "Whistle" instead a noun "Sign".
Whistle
Whistle noun - The act of signalling (e.g., summoning) by whistling or blowing a whistle.
Usage example: the whistle signalled the end of the game
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Synonyms for Whistle
Sign and whistle are semantically related. Sometimes you can use "Sign" instead the word "Whistle" as a noun or a verb.
Both words in one sentence
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In the epilogue You'Haru has given the go ahead sign for a long planned whistle blower operation, resulting in massive public scrutiny on Leiblich, which is forced to close down.
Source: Visual Novel / Ever17 - Your passenger will get increasingly annoyed with you each time the train gets hit, and fighting to keep the ship from being blown up by pirates apparently isn't a valid excuse for not blowing your whistle when a sign tells you to...
Cite this Source
Whistle and Sign. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/sign/whistle
Sign & Whistle. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/sign/whistle>.
Whistle or Sign. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/sign/whistle.
Google Ngram Viewer shows how "sign" and "whistle" have occurred on timeline