potent

heavy

straight, undiluted, unmixed

high-octane, high-test

enriched, fortified

concentrated

high-level, senior, top

able, capable, competent, effective, efficient

celebrated, distinguished, dominant, eminent, famed, famous, great, illustrious, noble, notable, noteworthy, notorious, outstanding, preeminent, prestigious, prominent, renowned

dynamic, energetic, forceful, high-powered, robust, vigorous

hyperefficient, ultraefficient

adequate, capable, competent

accomplished, adept, consummate, experienced, expert, masterly, practiced (also practised), proficient, skilled, skillful, versed, veteran, virtuoso

cogent, convincing, killer, sound, striking, telling, valid

active, dynamic

useful, working

applicable, feasible, functional, practicable, practical, realizable, usable (also useable), workable