Similar in meaning:
* Abrupt
* Curt
* Blunt
* Short
* Sharp
* Snappy
* Rude
* Impertinent
* Uncivil
More nuanced:
* Formal: Peremptory, abrupt, curt, terse
* Informal: Snippy, gruff, clipped, brisk, hasty, rough
* Negative: Discourteous, discourteous, discourteous, unkind, impolite
Other options:
* Direct: This can be a more neutral synonym, though it can also be used in a negative context.
* Concise: This focuses on brevity, not necessarily rudeness.
The best synonym for "brusque" will depend on the specific context and the nuance you want to convey.