Slender. Small, narrow, slim; weak, feeble, slight; moderate, trivial, inconsiderable, meager; spare, abstemious, frugal.
Ant. Thick, stout, robust, broad, ample, deep, bulky, considerable, massive, weighty; giant, colossal.
Slippery. Smooth, glib; mutable, uncertain, fickle, inconstant; unstable, changeable; wanton, loose, unchaste; icy, glassy, insecure, perilous, unsafe; shifty, elusive; deceptive, evasive; unprincipled.
Ant. Rough, firm, safe, secure, stable; constant, certain, dependable, upright, sincere, outright, trustworthy, sound.
Slow. Deliberate, dilatory, lingering, gradual, moderate, procrastinating, tardy; inert, inactive, sluggish, drowsy, dull, delaying, dawdling.
Ant. Nimble, active, brisk, alert, lively, prompt, speedy, quick, spry, swift, agile.
Small. Little, diminutive, inconsiderable; inconsequential, uninfluential, trivial, insignificant; paltry, mean, incapable, unable; short; weak, slender, gentle, low; tiny, puny; unimportant; scanty, moderate; sordid, selfish; inferior, unintellectual, ungifted, unintelligent.
Ant. Large, great, big, extensive, enormous, bulky, massive, weighty, ample, spacious, broad, strong, stout, generous, liberal, munificent; important, significant, notable, influential, distinguished, gifted, magnanimous, intelligent, intellectual, superior, competent.
Smart. Acute, quick, lively, brisk, clever, dashy, showy; pungent, pricking; keen, severe, poignant; vigorous, sharp; active, shrewd; efficient, witty; pretentious, spruce; fresh.
Ant. Dull, heavy, blunt, obtuse, dense, stupid; aching; slow, inactive, sluggish, inefficient, shabby, dowdy, boorish, clownish.