| bombproof | (noun) a chamber (often underground) reinforced against bombing and provided with food and living facilities; used during air raids | Synonyms: air-raid shelter, bomb shelter |
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| disproof | (noun) the act of determining that something is false | Synonyms: falsification, falsifying, refutal, refutation |
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| (noun) any evidence that helps to establish the falsity of something | Synonyms: falsification, refutation |
| proof | (noun) the act of validating; finding or testing the truth of something | Synonyms: substantiation, validation |
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| (noun) a trial photographic print from a negative | - |
| (noun) any factual evidence that helps to establish the truth of something | Synonyms: cogent evidence |
| (noun) a formal series of statements showing that if one thing is true something else necessarily follows from it | - |
| (noun) (printing) an impression made to check for errors | Synonyms: test copy, trial impression |
| (noun) a measure of alcoholic strength expressed as an integer twice the percentage of alcohol present (by volume) | - |
| reproof | (noun) an act or expression of criticism and censure | Synonyms: rebuke, reprehension, reprimand, reproval |
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| roof | (noun) a protective covering that covers or forms the top of a building | - |
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| (noun) protective covering on top of a motor vehicle | - |
| (noun) an upper limit on what is allowed | Synonyms: cap, ceiling |
| (noun) the inner top surface of a covered area or hollow space | - |
| sunroof | (noun) an automobile roof having a sliding or raisable panel | Synonyms: sunshine-roof |
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| waterproof | (noun) a water-resistant coat | Synonyms: raincoat |
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| (noun) any fabric impervious to water | - |