What is another word for "quick"?

Roget's Thesaurus (1911) lists these synonyms for "quick": acute, aesthetic, aesthetics, affectibility, alive, aromatic, aware, cause, chicken, conscious, consciousness, core, cultivate, die, enthusiastic, excitability, excitable, excite, expressive, external, fastidious, feel, feeling, gushing, have, heart, hearted, highflying, impassionable, impress, impressibility, impressible, impression, impressionable, impressive, inmost, keen, knowledge, lively, mettlesome.