Synonyms for prime

best, blue-ribbon, chief, dominant, elite, excellent, finest, first-class, first-rate, foremost, high-quality, ideal, impeccable, key, leading, main, major, optimal, optimum, perfect, preeminent, premier, premium., prepare, primary, principal, prototypical, quintessential, superb, superior, supreme, top-drawer, top-notch, top-tier