Queer, odd, curious, quaint, ridiculous, singular, unique, bizarre, fantastic, grotesque.

Rash, incautious, reckless, foolhardy, adventurous, venturous,
venturesome. 
Rebellion, insurrection, revolt, mutiny, riot, revolution, sedition. 
Recover, regain, retrieve, recoup, rally, recuperate. 
Reflect, deliberate, ponder, muse, meditate, ruminate. 
Relate, recount, recite, narrate, tell. 
Replace, supersede, supplant, succeed. 
Repulsive, unsightly, loathsome, hideous, grewsome. 
Requital, retaliation, reprisal, revenge, vengeance, retribution. 
Responsible, answerable, accountable, amenable, liable. 
Reveal, disclose, divulge, manifest, show, betray. 
Reverence, veneration, awe, adoration, worship. 
Ridicule, deride, mock, taunt, flout, twit, tease. 
Ripe, mature, mellow. 
Rise, arise, mount, ascend. 
Rogue, knave, rascal, miscreant, scamp, sharper, villain. 
Round, circular, rotund, spherical, globular, orbicular. 
Rub, polish, burnish, furbish, scour.

Sad, grave, sober, moody, doleful, downcast, dreary, woeful, somber,
unhappy, woebegone, mournful, depressed, despondent, gloomy, melancholy,
heavy-spirited, sorrowful, dismal, dejected, disconsolate, miserable,
lugubrious. 
Satiate, sate, surfeit, cloy, glut, gorge. 
Scoff, jeer, gibe, fleer, sneer, mock, taunt. 
Secret, covert, surreptitious, furtive, clandestine, underhand, stealthy. 
Seep, ooze, infiltrate, percolate, transude, exude. 
Sell, barter, vend, trade. 
Shape, form, figure, outline, conformation, configuration, contour,
profile. 
Share, partake, participate, divide. 
Sharp, keen, acute, cutting, trenchant, incisive. 
Shore, coast, littoral, beach, strand, bank. 
Shorten, abridge, abbreviate, curtail, truncate, syncopate. 
Show (noun), display, ostentation, parade, pomp, splurge. 
Show, exhibit, display, expose, manifest, evince. 
Shrink, flinch, wince, blench, quail. 
Shun, avoid, eschew. 
Shy, bashful, diffident, modest, coy, timid, shrinking. 
Sign, omen, auspice, portent, prognostic, augury, foretoken, adumbration,
presage, indication. 
Simple, innocent, artless, unsophisticated, naive. 
Skilful, skilled, expert, adept, apt, proficient, adroit, dexterous, deft,
clever, ingenious. 
Skin, hide, pelt, fell. 
Sleepy, drowsy, slumberous, somnolent, sluggish, torpid, dull, lethargic. 
Slovenly, slatternly, dowdy, frowsy, blowzy. 
Sly, crafty, cunning, subtle, wily, artful, politic, designing. 
Smile, smirk, grin. 
Solitary, lonely, lone, lonesome, desolate, deserted, uninhabited. 
Sour, acid, tart, acrid, acidulous, acetose, acerbitous, astringent. 
Speech, discourse, oration, address, sermon, declamation, dissertation,
exhortation, disquisition, harangue, diatribe, tirade, screed, philippic,
invective, rhapsody, plea. 
Spruce, natty, dapper, smart, chic.