thick Antonyms

thin meltable shallow sharp sheer shrewd skinny slim smart spare splintery straggling talented thinly thinnish thready semitransparent sagacious meshy nimble paper papery peekaboo penetrable perceptive piquant proficient pulverous pulverulent quick quick-witted rational resourceful tiffany vaporific scholared sharp-cornered whip-smart vapourish wasp-waisted wispy agile enough as sharp as a needle well-versed able to think quickly extremely clever mentally acute able to understand quickly as sharp as a razor as sharp as a tack