This section is from the book "Hill's Manual Of Social And Business Forms: A Guide To Correct Writing", by Thos. E. Hill. Also available from Amazon: Hill's Manual Of Social And Business Forms: The How-To-Do-Everything Book Of Victorian America.
Summon - cite, call, invite, bid, convoke.
Sundry - several,various, diverse, different.
Superficial - flimsy, slight, shallow.
Supersede - supplant, overrule, displace. Supplicate - solicit, entreat, beg, beseech, ask, implore.
Support - maintain, uphold, sustain, defend, encourage, second, prop, protect, favor, forward, cherish, assist, endure.
Sure - reliable, confident, certain, infallible.
Surmise - presume, think, guess, suppose, believe, conjecture.
Surmount - subdue, overcome, vanquish, conquer.
Surpass - beat, outdo, outstrip, excel, exceed.
Surprise - astonishment, admiration, wonder, amazement.
Surrender - yield, resign, give up, deliver.
Surround - encompass, enclose, encircle, environ.
Survey - review, prospect, retrospect.
Suspense - hesitation, doubt, uncertainty.
Suspicion - distrust, jealousy, apprehension.
Sustain - carry, bear, support, uphold, maintain.
Sustenance - livelihood, living, maintenance, support.
Swiftness - speed, rapidity, velocity, fleetness, quickness, celerity.
Sympathy - compassion, condolence, agreement, commisera-tion.
Symptom - evidence, indication, token, sign, mark, note.
System - order, method.
Talent - faculty, ability, gift, endowment, capability, intellectuality.
Talk - conference, discourse, chat, conversation, sermon, communication, lecture, dialogue, colloquy.
Tantalize - plague, tease, taunt, provoke, irritate, torment, aggravate.
Taste - perception, discernment, judgment, flavor, savor, relish.
Tax - duty, assessment, rate, toll, tribute, contribution, custom.
Tedious - wearisome, slow, tiresome, tardy.
Tell - inform, communicate, reveal, disclose, acquaint, impart, mention, state, talk, report.
Temper - mood, humor, temperament, disposition.
Temperate - moderate, sober, abstemious, abstinent.
Temporal - worldly, mundane, sublunary, secular.
Temporary - uncertain, fleeting, transitory, transient.
Tempt - allure, induce, entice, attract, decoy, seduce.
Tender - propose, offer, bid.
Tenderness - fondness, love, humanity, affection, benignity.
Tenet - belief, dogma, doctrine, principle, position, opinion.
Terms - conditions, words, expressions, language.
Terminate - close, finish, end, complete.
Terrible - awful, frightful, fearful, shocking, terrific, horrible.
Terror - alarm, fear, dread, consternation, apprehension, fright.
Test - experiment, proof, experience, trial, standard, criterion.
Testify - prove, declare, swear, signify, witness, affirm.
Testimony - proof, evidence.
Therefore - wherefore, accordingly, then, hence, so, consequently.
Think - consider, deliberate, mediate, ponder, conceive, contemplate, imagine, surmise.
Though - allow, while, although.
Thought - contemplation; meditation, fancy, idea, supposition, reflection, conception, conceit.
Thoughtful - anxious, considerate, careful, attentive, discreet, contemplative.
Thoughtless - inconsiderate, indiscreet, careless, foolish, hasty, unthinking.
Throw - heave, cast, hurl, fling.
Timely - opportune, seasonable, early.
Tired - wearied, fatigued, harassed.
Title - name, appellation, claim.
Token - emblem, sign, indication, symptom, mark, note.
Tolerate - permit, allow, suffer.
Tortuous - tormenting, crooked, twisted, winding.
Total - complete, whole, entire, gross, sum.
Touching - moving, pathetic, affecting.
Tour - round, circuit, jaunt, trip, journey, ramble, excursion.
Trace - clue, track, mark, vestige.
Trade - vocation, business, calling, labor, occupation, dealing, traffic.
Traduce - injure, condemn, censure, depreciate, degrade, decry, calumniate, detract.
Tranquillity - stillness, peace, quiet, calm.
Transact - manage, conduct, negotiate.
Transcend - surpass, excel, exceed, outdo.
Transparent - clear, pellucid, pervious, translucent.
Transient - brief, fleeting, short.
Transport - delight, rapture, ecstasy.
Treacherous - insidious, faithless, dishonest, perfidious, heart-less.
Trepidation - palpitation, emo-tion, trembling, tremor, agitation.
Trespass - violation, transgression, offense, misdemeanor.
Trial - endeavor, attempt, effort, experiment, test, proof, temptation.
Trick - cheat, fraud, deception, artifice, imposture, stratagem, jugglery.
Trifling - insignificant, inconsiderable, unimportant, light, futile, petty, frivolous.
Trip - journey, jaunt, excursion, tour, ramble, voyage.
Trouble - anxiety, vexation, adversity, affliction, sorrow, distress.
Troublesome - annoying, disturbing, vexing, perplexing, irksome, teasing, harassing, importunate.
True - honest, candid, sincere, reliable, plain, upright.
Truth - fidelity, veracity, candor, faithfulness, honesty.
Try - endeavor, attempt.
Turbulent - raging, tumultuous, seditious, mutinous, riotous.
Turn - revolve, whirl, twist, circulate, wind, gyrate, contort, bend, distort, wheel.
Type - illustration, symbol, figure, emblem, mark.
"Ultimate - latest, last, final, end.
Umpire - judge, arbitrator, arbiter.
Unbelief - incredulity, disbelief, skepticism, infidelity.
Unblemished - faultless, blameless, spotless, irreproachable, untarnished, stainless.
Unceasingly - eternally, perpetually, always, constantly, continually.
Unchangeable - unalterable, immutable.
Uncommon - singular, unusual, rare, unique, infrequent, choice, scarce.
Unconcerned - careless, regardless, uninterested, indifferent.
Uncover - reveal, expose, strip, discover.