| advisor | (noun) an expert who gives advice | Synonyms: adviser, consultant |
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| advisory | (noun) an announcement that usually advises or warns the public of some threat | - |
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| devisor | (noun) someone who devises real property in a will | - |
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| divisor | (noun) the number by which a dividend is divided | - |
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| (noun) one of two or more integers that can be exactly divided into another integer | Synonyms: factor |
| proviso | (noun) a stipulated condition | Synonyms: provision |
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| supervisor | (noun) a program that controls the execution of other programs | Synonyms: executive program, supervisory program |
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| (noun) one who supervises or has charge and direction of | - |
| visor | (noun) a brim that projects to the front to shade the eyes | Synonyms: bill, eyeshade, peak, vizor |
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| (noun) a piece of armor plate (with eye slits) fixed or hinged to a medieval helmet to protect the face | Synonyms: vizor |