Letter: s
- sanity, IQ, apprehension, balance, calibre, capacity, common sense, comprehension, conception, cool head, coolness, deductive power, due sense of, good sense, horse sense, ideation

- sans serif, ascender, back, bastard type, beard, belly, bevel, black letter, body, cap, capital, case, counter, descender, em, en

- sans, empty, failing, lacking, less, minus, wanting, without

- sans-culotte, Bolshevik, Charley, Jacobin, Marxist, Red, Yankee, anarchist, extremist, lunatic fringe, nihilist, pink, radical, rebel, red, revolutionary

- Santa Claus, almoner, angel, assignor, awarder, backer, cheerful giver, conferrer, consignor, contributor, donor, fairy godmother, funder, giver, lady bountiful, patron

- sap the foundations, honeycomb, overthrow, overturn, sap, subvert, throw down, throw over, undermine, upend, upset, weaken

- sap, abate, approach trench, ass hole, attenuate, axiom, babe, beverage, blood, blunt, boob, booby, bore, bunker, burrow, centre

- sapience, depth, erudition, insight, mind, profundity, prudence, sagacity, understanding, wisdom, wit

- sapient, authority, broad-minded, deep, discriminating, doctor, elder, elder statesman, erudite, great soul, guru, illuminate, intellect, intellectual, judicious, knowing

- sapless, anaemic, anhydrous, arid, athirst, bland, bloodless, bone-dry, chicken, cowardly, dead, debilitated, desert, dilute, diluted, drivelling

- sapling, adolescent, baby, conifer, evergreen, fledgling, fruit tree, hardwood tree, hopeful, infant, junior, juvenile, minor, pubescent, scion, seedling

- sapped, burned-out, devitalized, disabled, drained, effete, enervated, enfeebled, eviscerated, exhausted, fatigued, incapacitated, played out, run-down, spent, used up

- sapper, dredge, engineer, ground hog, miner, navvy, pioneer

- sapphire, adamant, agate, amethyst, aquamarine, azure, azure-blue, azure-coloured, beryl, beryl-blue, bloodstone, blue, bluish, brilliant, carbuncle, carnelian

- sappiness, buffoonery, eccentricity, fatuity, flow, fluency, fluidity, flux, folly, foolery, frivolity, greenness, idiocy, imbecility, immaturity, inanity

- sapping, drain, draining, exhausting, fatiguing, gruelling, trying, weakening

- sappy, absurd, apish, asinine, balmy, bathetic, batty, beery, beguiled, besotted, brainless, budding, buffoonish, callow, cloying, cock-eyed

- saprophyte, algae, bean, bracken, brown algae, climber, creeper, diatom, fern, fruits and vegetables, fungus, grapevine, green algae, herb, ivy, kelp

- saprophytic, accompanying, accordant, agreeing, associate, associated, at one with, coincident, collaborative, collective, collusive, combined, combining, concerted, concomitant, concordant

- sarcasm, acerbity, acridity, acridness, acrimony, agile wit, asperity, bitterness, black humour, burlesque, caricature, causticity, comedy, contumely, corrosiveness, cynicism

- sarcastic, acerbic, acid, acidic, acidulous, acrid, acrimonious, biting, bitter, captious, carping, caustic, cavilling, censorious, contemptuous, contumelious

- sarcoma, benign tumour, callosity, callus, cancer, carcinoma, corn, cyst, excrescence, fungus, growth, malignant growth, metastatic tumour, mole, morbid growth, neoplasm

- sarcophagus, box, carton, case, casket, compact, file

- sardonic grin, beam, fleer, grin, grinning, leer, simper, smile, smiling, smirk, sneer, snicker, snigger, snort

- sardonic, caustic, contemptuous, corrosive, cynical, derisive, derisory, disdainful, dry, ironic, ironical, jeering, mocking, sarcastic, satiric, saturnine

- sartorial, ready-to-wear, tailored

- sash, cadre, case, casement, casing, chassis, cincture, fabric, frame, framework, framing, girdle, lattice, latticework, picture frame, shell

- Satan, Beelzebub, Cerberus, Hades, Loki, Lucifer, Minos, consummate liar, deuce, devil-god, dirty liar, equivocator, fabricator, fallen angel, false witness, falsifier

- satanic cunning, art, artfulness, artifice, canniness, cleverness, craft, cunning, finesse, gamesmanship, guile, inventiveness, readiness, sharpness, shrewdness, sophistry

- satanic, Draconian, abhorrent, abominable, amoral, animal, atrocious, barbaric, barbarous, beastly, bestial, black, bloodthirsty, bloody, bloody-minded, brutal
