18 synonyms for hectic such as buzzing, brisk, and bustling. Hectic is an adjective, and its antonyms are leisurely and quiet.
Brisk, bustling, buzzing, crowded, fast and furious, feverish, frantic, frenetic, frenzied, heaving, like Piccadilly Circus, lively, manic, restless, very active, very busy, and vibrant.