bright, vivid, splendid, smart as a whip, glorious, magnificent, impressive, intelligent, brainy, colourful, more...

dull, dim, stupid, mediocre, uninspired

smart, intelligent, clever, witty, astute, sagacious, acute, keen, canny, more...

most, dear, percent, cut, beautiful, crowned, handsome, little, captain, heavy

very bright,   really smart,   very intelligent,   highly intelligent,   extremely bright,   extremely smart,   super smart,   very bright light,   very clever,   overly smart