| abrupt | (adjective) surprisingly and unceremoniously brusque in manner | - |
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| (adjective) marked by sudden changes in subject and sharp transitions | Synonyms: disconnected |
| (adjective) dangerously steep | Synonyms: precipitous, sharp |
| (adjective) exceedingly sudden and unexpected | - |
| abruption | (noun) an instance of sudden interruption | Synonyms: breaking off |
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| abruptly | (adverb) quickly and without warning; happening unexpectedly; on impulse; without premeditation | Synonyms: all of a sudden, dead, of a sudden, on the spur of the moment, short, suddenly |
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| abruptness | (noun) the quality of happening with headlong haste or without warning | Synonyms: precipitance, precipitancy, precipitateness, precipitousness, suddenness |
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| (noun) the property possessed by a slope that is very steep | Synonyms: precipitousness, steepness |
| (noun) an abrupt discourteous manner | Synonyms: brusqueness, curtness, gruffness, shortness |