Thesaurus

A-one, ablaze, ace, agile, agleam, aglitter, aglow, alert, amazing, apt, ardent, arresting, astonishing, astounding, awe-inspiring, awesome, awful, awing, banner, baronial, beadlike, beady, beaming, beamy, best, blazing, blinding, blue-ribbon, born, boss, brag, brainy, bright, bright as a new penny, brilliant, buttonlike, buttony, capital, changeable, chatoyant, choice, chromatic, clever, clinking, colorful, colourful, coruscant, crack, dazzling, deep, dramatic, echoing, effulgent, excellent, expansive, eye-popping, fantabulous, fantastic, first-class, first-rate, flaming, flashing, fluorescent, formidable, fulgent, fulgid, fulgurant, fulgurous, gallant, gilt-edged, glaring, glary, gleaming, glimmering, glimmery, glinting, glistening, glistering, glittering, glittery, glorious, glossy, grand, grandiose, greatest, heroic, high-performance, hollow, important-looking, imposing, impressive, innate, intelligent, iridescent, jingling, jingly, lambent, live, lofty, lucent, luminous, lurid, lustrous, magnificent, majestic, mind-boggling, moving, nacreous, natural, nimble, nitid, noble, noctilucent, opalescent, opaline, outstanding, palatial, pearlescent, precocious, prehensile, premium, prime, prismatic, prize, proud, psychedelic, pucka, pukka, quality, quick, radiant, ready, reechoing, refulgent, resonant, resonating, resounding, reverberant, reverberating, reverberative, rich, ringing, rolling, scintillant, scintillating, searching, select, self-luminous, sensational, sheeny, shimmery, shining, shiny, shot, shrill, signal, silver, silvern, silvery, smart, smart as a whip, sparkly, spectacular, spiffing, splendid, staggering, stately, sterling, striking, stunning, stupefying, super, superb, superior, superlative, supreme, surpassing, thundering, tinkling, tinkly, tiptop, top-flight, top-hole, topnotch, topping, tops, transcendent, trenchant, twinkling, vibrant, vivid, weapons-grade, well-made

brilliant is a ADJ.