sixty years.  Associated Words:  sexagenarian, sexagenary.

six years.  Associated Words:  sexennial, sexennially.

size, n. magnitude, volume, dimensions, amplitude, bulk, extent, bigness.

skedaddle, v. (Slang) run away, flee, decamp, scuttle, scamper, scurry.

skeptic, n. unbeliever, infidel.

skeptical, a. doubtful, disbelieving, incredulous.  Antonym:  credulous.

skepticism, n. doubt, incredulity, infidelity; Pyrrhonism.  Antonym:  credulity.

sketch, n. draught, outline, plan, drawing, design, scenario, esquisse.

sketch, v. draught, portray, draw, depict, delineate.

skid, n. drag, clog, skidpan.

skill, n. adroitness, ingenuity, cleverness, technic, dexterity, proficiency, expertness, facility, deftness, knack.  Antonyms:  maladroitness, empiricism, quackery, inexpertness, clumsiness.

skillful, a. skilled, expert, adroit, dexterous, adept, masterly, proficient, deft, able, efficient, competent, accomplished.  Antonyms:  unskillful, empirical, maladroit.

skimp, v. (Colloq.) scamp, slight, scrimp, save.

skimpy, a. (Colloq.) scant, skimp.

skin, n. integument, tegument, derm; epidermis, cuticle, scarfskin; true skin, dermis, derma, cutis; membrane, epithelium, ecteron, enderon, ecderon; pelt, pell, pelage, peltry; hide, kip; husk, hull, glume; (of fruit) peel, peeling, rind, paring, epicarp; pellicle, film; episperm, testa, tegmen; slough, exuviae (cast-off-skin); parchment, vellum.  Antonyms:  pulp, flesh.  Associated Words:  dermatology, dermatologist, dermic, dermatic, dermal, cutaneous, dermatitis, dermatography, dermatoid, smegma, caul, dermatopathic, dermoplastic, dermoplasty, hypodermic, subcutaneous, dermatopathy, exuviate, exuviation, desquamate, desquamation, slough, dermatophyte, dermostosis, cuticular, epidermal, apellous, abrasion, emphractic, excoriation.

skin, v. flay, excoriate; pare, peel; (Slang) cheat, defraud, fleece.

skin-deep, a. superficial.

skinflint, n. miser, niggard, curmudgeon, scrimp, screw.

skinny, a. emaciated, gaunt, rawboned, poor.

skip, v. omit, pass, disregard; caper, gambol, jump, leap; ricochet.

skip, n. omission; gambol, caper, hop, leap; ricochet.

skipper, n. sea-captain; cheese maggot.

skirt, n. petticoat (underskirt); kilt; fustanella; kirtle; margin, border, edge, rim.

skirt opening. placket.

skit, n. reflection, jeer, gibe, satire, squib.

skittish, a. timorous, shy; volatile, restless, wanton.

skulk, v. sneak, slink, lurk.

skull, n. cranium; death’s-head.  Associated Words:  cranial, acrania, acranial, craniology, phrenology, trepan, trephine, fontanel, sphenoid, cephalism, parietes, parietal, crossbones, occiput, frontal, sinciput.

skullcap, a. calotte.

sky, n. firmament, welkin, empyrean, azure, the heavens.  Associated words:  meridian, zenith, nadir, horizon, uranology, uranography, zodiac.