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.
Respectful - deferential, dutiful, obedient, civil.
Respite - delay, suspension, interval, reprieve.
Responsible - amenable, answer-able, accountable.
Rest - quiet, ease, repose, intermission, stop, cessation, others, remainder.
Restore - cure, renew, return, repay, rebuild.
Restrain - confine, repress, restrict, coerce, limit, constrain.
Restrict - limit, circumscribe, hold, bind.
Result - effect, issue, ultimate, consequence, event.
Retain - hold, detain, keep, reserve.
Retard - hinder, defer, protract, postpone, delay, procrastinate, prolong, prevent, impede.
Retire - recede, withdraw, retreat, secede.
Retract - annul, take back, revoke, recant, recall.
Retrieve - renew, recover, regain.
Reveal - impart, divulge, communicate, disclose, expose.
Revenge - vindicate, avenge.
Revere - adore, worship, reverence, venerate.
Review- examine, survey, notice, revision.
Revive - enliven, renew, reanimate, refresh, renovate.
Revoke - cancel, annul, abolish, repeal, abrogate, efface, retract.
Reward - recompense, remuneration, compensation, satisfaction.
Riches - wealth, opulence, affluence.
Ridicule - deride, banter, laugh at.
Ridiculous - droll, absurd, ludicrous, preposterous, unreasonable, improbable.
Righteous - just, godly, upright, honest, incorrupt, virtuous.
Road - path, way, course, route.
Roam - wander, ramble, stroll, range, rove.
Room - chamber, space, place, apartment.
Rough - harsh, uncivil, rude, uncouth, unmannerly, unpolished, rugged, severe, stormy.
Round - globular, spherical, orb, circuit, tour.
Route - path, course, way. road.
Rude - rough, impertinent, coarse, impudent, unpolished, saucy, dis-greeable, bold.
Sacred - holy, divine, devoted.
Sad - sorrowful, mournful, dejected, gloomy, melancholy.
Sagacity - perception, penetration, acuteness, discernment.
Salary - wages, pay, stipend, hire, reward, remuneration.
Sanction - maintain, sustain, uphold, countenance, ratify, support.
Sapient - discreet, wise, sage, sagacious.
Sarcasm - satire, irony, ridicule.
Satisfaction - compensation, remuneration, contentment, atonement, reward.
Saving - prudent, thrifty, frugal, economical, close, sparing, stingy, penurious.
Saying - adage, maxim, proverb, by-word, relating, speaking, uttering, communicating.
Scandal - disgrace, reproach, discredit, baseness, infamy.
Scarce - uncommon, unusual, singular, rare.
Scatter - disseminate, dissipate, spread, disperse.
Scent; - odor, smell, perfume, fragrance.
Scoff - ridicule, sneer, jeer, jibe, belittle.
Scope - object, tendency, aim, drift.
Scruple - hesitate, doubt, fluctuate.
Scrupulous - truthful, upright, correct, careful, conscientious, cautious.
Scrutinize - search, examine, in vestigate.
Scurrilous - disgusting, abusive, offensive, insulting, insolent.
Search - inquiry, examination, scrutiny, pursuit, investigation.
Secede - withdraw, retire, recede.
Seclusion - quietude, privacy, solitude, retirement, loneliness.
Secondary - subordinate, inferior.
Secret - hidden, quiet, still, concealed, latent, mysterious, clandestine.
Secular - temporal, wordly.
Secure - safe, certain, confident, sure, procure, warrant.
Security - pledge, warranty, defense, guard, protection.
Sedate - serene, calm, unruffled, unconcerned, still, quiet, composed.
Seduce - decoy, betray, attract, allure.
See - examine, look, behold, observe, perceive, view.
Sense - idea, feeling, meaning, judgment, import, reason.
Sensitive - keen, susceptible, appreciative.
Sentence - mandate, judgment, decision, period, phrase, proposition.
Sentiment - expression, opinion, notion, feeling.
Separate - dissociate, detach, disengage.
Settle - determine, fix, establish, arrange, adjust, regulate.
Settled - conclusive, decided, confirmed, established.
Sever - separate, disjoin, divide, detach.
Several - sundry, different, various, diverse.
Severe - cold, stern, harsh, sharp, rigid, cruel, heartless, rough, strict, unyielding, austere, rigorous.
Shake - shiver, quiver, shudder, quake, agitate, totter.
Shame - dishonor, disgrace, ignominy.
Shameless - insolent, impudent, immodest, indelicate, indecent.
Shape - form, fashion, mould.
Share - divide, distribute, apportion, participate, partake.
Sharpness - shrewdness, penetra-tion, keenness, acuteness, sagacity, cunning.
Shelter - shield, defend, screen, harbor, protect, cover.
Shine - illumine, glisten, gleam, glitter, glare.
Shining - bright, glittering, radiant, glistening, brilliant.
Shocking - disgusting, terrible, dreadful, horrible.
Short - brief, concise, scanty, defective, brittle.
Shorten - lessen, contract, reduce, abridge, curtail.
Show - display, exhibition, pomp, parade, representation, spectacle, sight.
Showy - grand, ostentatious, gay, gaudy, fine, sumptuous.
Shrewd - sharp, acute, keen, precise.
Shun - evade, avoid, elude.
Sickly - unwell, sick, ill, diseased, indisposed.
Sign - indication, omen, symptom, signal, note, mark, token.
Signify - imply, express, betoken, denote, declare, utter, intimate, testify.
Silence - quietude, stillness, muteness.
Silent - dumb, mute, speechless, still.
Silly - ridiculous, foolish, absurd, stupid, dull, weak, simple.
Similarity - resemblance, likeness, similitude.