Synonyms and related words :
airy, amateur, amateurish, ankle-deep, asinine, bank, bar, birdbrained, birdwitted, catchpenny, coral reef, cursory, dabbling, depthless, dilettante, dilettantish, empty, epidermal, fatuous, featherbrained, few, fill in, fill up, flat, flighty, flimsy, fluffy, foolish, footling, ford, fribble, fribbling, frivolous, frothy, futile, half-assed, half-baked, half-cocked, idle, immature, inane, inconsequential, inconsiderable, insignificant, jejune, knee-deep, light, little, low, meager, miniature, negligible, no great shakes, not deep, nugacious, nugatory, on the surface, otiose, petty, picayune, picayunish, reef, sandbank, sandbar, sciolistic, shallow-headed, shallow-minded, shallow-pated, shallow-rooted, shallow-witted, shallows, shelf, shoal, shoal water, shoals, short, silly, silt up, skin-deep, slender, slight, small, smattering, sophomoric, superficial, surface, thin, tidal flats, tiny, trifling, trite, trivial, unimportant, unprofound, vacuous, vain, vapid, volatile, wetlands, windy