| 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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| chemisorption | (noun) adsorption (especially when irreversible) by means of chemical instead of physical forces | Synonyms: chemosorption |
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| devisor | (noun) someone who devises real property in a will | - |
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| disorder | (noun) a disturbance of the peace or of public order | - |
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| (noun) a condition in which things are not in their expected places | Synonyms: disorderliness |
| (noun) a physical condition in which there is a disturbance of normal functioning | Synonyms: upset |
| disorderliness | (noun) untidiness (especially of clothing and appearance) | Synonyms: disarray |
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| (noun) a condition in which things are not in their expected places | Synonyms: disorder |
| (noun) rowdy behavior | Synonyms: roughness, rowdiness, rowdyism |
| disorganisation | (noun) the disturbance of a systematic arrangement causing disorder and confusion | Synonyms: disorganization |
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| (noun) a condition in which an orderly system has been disrupted | Synonyms: disarrangement, disorganization |
| disorganization | (noun) the disturbance of a systematic arrangement causing disorder and confusion | Synonyms: disorganisation |
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| (noun) a condition in which an orderly system has been disrupted | Synonyms: disarrangement, disorganisation |
| disorientation | (noun) a wild delusion (especially one induced by a hallucinogenic drug) | Synonyms: freak out |
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| (noun) confusion (usually transient) about where you are and how to proceed; uncertainty as to direction | - |
| 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 |
| incisor | (noun) a tooth for cutting or gnawing; located in the front of the mouth in both jaws | - |
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| promisor | (noun) a person who makes a promise | Synonyms: promiser |
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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 |