Check
Check verb - To be in agreement on every point.
Warn
Warn verb - To give notice to beforehand especially of danger or risk.
Mutual synonyms
Both words in one sentence
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Exact Words: If you ask Mortadelo to check for any guard dogs, he won't warn you about the hungry crocodile... Also, if he tells you that there is "nothing" behind a door, don't go rushing through it too fast.
Source: Comic Book / Mortadelo y Filemón -
Failed a Spot Check: There's no excuse for why the pilots of the Windsor didn't look at their altimeter and realized how close they were to the ground, or why there is no ground-proximity warning system on the plane to warn them when they are about to hit the ground.
Source: Film / Die Hard 2 -
Failed a Spot Check: While some guards in Diamant may warn you to leave when you go for Alf after he kills Weiss, no one else bats an eyelash that this random group of people can somehow walk around town, entering people's homes, when there's a Charter that'll kill you for not staying in your house.
Source: Video Game / Arc Rise Fantasia
Cite this Source
Warn and Check. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/check/warn
Check & Warn. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/check/warn>.
Warn or Check. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/check/warn.
Google Ngram Viewer shows how "check" and "warn" have occurred on timeline