fast synonyms: fast 1rapid swift fleet 2speedy quick hasty expeditious These adjectives refer to something marked by great Accomplished in very little time. 1. fast (adj.) 3. fast (n.) abstaining from food. Synonyms: fasting · hunger strike 5. fast (v.) abstain from certain foods, as for religious or medical reasons. Synonyms for high-speed at sportromagna.net with free online thesaurus, antonyms, and definitions. adj extremely fast See more synonyms for breakneck. The horse broke into a brisk trot. If something is stuck fast, it is stuck very firmly and cannot. Cybertort is a willful act done by a person on internet that may cause legal injuries to virtual identity or virtual property of a person in cyberspace. Thesaurus for fast from the Collins English Thesaurus. Please set a username for .