Letter: b
- back track, backing, backup, reversal, reverse, reversion, right-about-face, turnabout, turnaround
- back trail, backing, backup, reversal, reverse, reversion, right-about-face, turnabout, turnaround
- back up, act for, advance, affirm, afford support, answer for, appear for, ascend, attest, authenticate, back, back away, back off, back-pedal, backtrack, backwater
- back way, back door, back road, back stairs, back street, bolt-hole, by-lane, bypass, bypath, byroad, byway, covert way, detour, escape hatch, escape route, roundabout way
- back when, ago, back, backward, gone by, since
- back, a priori, abandon, abet, accented, acknowledgements, advance, advocate, affirm, afford support, aft, after, aftermost, again, against the grain, ago
- back-and-forth, alternate, alternation, back and forth, coming and going, ebb and flow, flux and reflux, reciprocal, reciprocation, see-saw, sine wave, teeter, teetering, tottering, up-and-down, ups and downs
- back-biting, abusive, belittling, bitchy, catty, censorious, contemptuous, contumelious, defamatory, deprecatory, derisive, derogative, derogatory, disparaging, libellous, pejorative
- back-burner, dinky, dispensable, immaterial, inappreciable, inconsequential, inconsiderable, inferior, insignificant, irrelevant, little, minor, minute, negligible, non-essential, small
- back-country, back, back of beyond, backwoods, outback, sylvan, virgin, waste, wild, woodland
- back-door, backstairs, clandestine, covert, feline, furtive, illicit, privy, quiet, shifty, skulking, slinky, sly, sneaking, sneaky, stealthy
- back-fence gossip, chitchat, gossip, idle talk, story, tale, talk, tattle
- back-flowing, ascending, axial, back, backward, descending, downward, drifting, flowing, fluent, flying, going, mounting, passing, plunging, progressive
- back-number, banal, bewhiskered, common, commonplace, corny, dated, fade, familiar, fusty, hackneyed, musty, old hat, old-fashioned, out of date, out of season
- back-pedal, arrest, back, back away, back off, back out, back up, backtrack, backwater, brake, check, clip the wings, cry off, curb, decelerate, delay
- back-seat driver, Dutch uncle, Sunday driver, admonisher, adviser, bus driver, busman, busybody, cabdriver, chauffeur, confidant, consultant, counsel, counsellor, driver, expert
- back-to-front, backward, head over heels, inside out, introverted, inverted, reversed, transposed, upside down
- backache, abscess, ache, aching, ague, anaemia, angina, asphyxiation, asthma, atrophy, bellyache, chill, colic, constipation, convulsion, diarrhoea
- backbite, disparage, libel, malign, slander
- backbiter, cynic, debunker, disparager, hatchet man, knocker, muckraker, mudslinger, slanderer
- backbone, advocate, arm, athletic supporter, back, backing, bandeau, bearer, bottom, bra, brace, bracer, bracket, brassiere, buttress, cane
- backbreaking, Herculean, annoying, arduous, besetting, bothersome, burdensome, crushing, forced, gruelling, hard-earned, hard-fought, heavy, hefty, irksome, killing
- backdate, antedate, date, postdate, pre-date, update
- backdrop, act drop, arena, asbestos, asbestos board, back, background, batten, border, cloth, counterweight, curtain, curtain board, distance, drop, drop curtain
- backed, accepted, acclaimed, admired, admitted, advocated, applauded, approved, calcified, callous, calloused, case-hardened, cried up, crusted, crusty, crystallized
- backer, Dionysus, Samaritan, Santa Claus, abettor, acquaintance, admirer, advocate, aficionado, aid, aider, ally, almoner, alter ego, angel, apologist
- backfire, backlash, backlashing, bang, beacon, beacon fire, blast, blaze, blow out, blow up, blow-out, blow-up, bonfire, boom, boomerang, bounce
- backgammon, bingo, checkers, chess, game, sport
- background detail, background, design, detail, figure, foil, form, motif, pattern, period style, setting, style, theme, touch
- background, action, amphitheatre, angle, architectonics, architecture, arena, argument, athletic field, atmosphere, auditorium, back, backdrop, background detail, backstage, bear garden
