Letter: b
- bachelor girl, maid, maiden, miss, old maid, spinster, vestal, virgin
- bachelor, Lancelot, baccalaureate, baronet, caballero, cavalier, chevalier, companion, degree, doctor, doctorate, knight, knight bachelor, knight baronet, knight-errant, master
- bachelorhood, celibacy, continence, maidenhead, maidenhood, misogamy, misogyny, monasticism, single blessedness, single state, singleness, spinsterhood, unwed state, virgin state, virginity
- bacillary dysentery, German measles, ague, anthrax, black death, cholera, diphtheria, dysentery, flu, hepatitis, herpes, hookworm, hydrophobia, infantile paralysis, influenza, leprosy
- bacillus, aerobic bacteria, amoeba, anaerobe, anaerobic bacteria, bacteria, bacterium, bug, coccus, disease-producing micro-organism, filterable virus, fungus, germ, gram-negative bacteria, gram-positive bacteria, micro-organism
- back and fill, about ship, alternate, battledore and shuttlecock, bear away, bear off, bear to starboard, beat, beat about, box off, break, bring about, bring round, cant, cant round, cast
- back and forth, alternate, alternately, back-and-forth, backward and forward, backwards and forwards, capriciously, changeably, desultorily, erratically, hitch and hike, in and out, inconstantly, off and on, on and off, reciprocal
- back answer, acknowledgement, antiphon, back talk, comeback, crack, cut, cutting remark, dig, dump, echo, fleer, flout, foolery, gibe, jab
- back away, back, back up, back-pedal, backwater, pull, reverse
- back band, bit, blind, blinders, breeching, bridle, caparison, cinch, collar, crupper, curb, girth, halter, harness, headgear, lines
- back biting, abuse, animadversion, backstabbing, belittlement, calumnious, calumny, defamation, defamatory, depreciation, detracting, disparagement, invective, maligning, obloquy, reflection
- back country, air space, back, back of beyond, backwood, backwoods, boon docks, borderland, brush, bush country, clear space, clearance, clearing, desert, distant prospect, empty view
- back debts, arrearage, arrears, default, deficit, overdraft
- back door, archway, back, back road, back seat, back side, back stairs, back street, back way, backstairs, behind, bolt-hole, breech, bulkhead, by-lane, bypass
- back down, abjure, back off, back out, back-pedal, backtrack, backwater, balance, baulk, beat a retreat, beg off, break off combat, cave in, cease resistance, climb down, cry off
- back formation, acrostic, compound, construction, formation, spoonerism
- back matter, PS, acknowledgements, addendum, afterthought, appendix, article, back, bastard title, bibliography, book, catch line, catchword, chapter, chorus, clause
- back number, Methuselah, antediluvian, antique, banal, behind the times, bewhiskered, bromidic, collection, common, commonplace, conservative, copy, corny, cut-and-dried, dad
- back of beyond, North Pole, Siberia, South Pole, Timbuktu, antipodean, antipodes, back, back-country, backwood, backwoods, frontier, godforsaken, godforsaken place, hinterland, inaccessible
- back off, back, back down, back up, back-pedal, backwater, give, pull, reverse
- back out, abandon, abjure, back down, back-pedal, backwater, beat a retreat, beg off, boggle, chicken, chicken out, climb down, cry off, deny, depart from, desert under fire
- back payments, arrearage, arrears, default, deficit, overdraft
- back road, back door, back stairs, back way, bypass, byway, detour, side door, side road
- back seat, back, back door, back side, behind, breech, heel, hind end, hind part, humbleness, humility, inferiority, juniority, lowliness, minority, posterior
- back side, back, back door, back seat, behind, breech, heel, hind end, posterior, rear end, rearward, reverse, stern, tail
- back stairs, back door, back road, back street, back way, bolt-hole, by-lane, bypass, bypath, byroad, byway, companion, companionway, covert way, detour, escape hatch
- back stream, backwash, backwater, eddy, gulf, maelstrom, reflux, regurgitation, swirl, twirl, vortex, whirl, whirlpool
- back street, back door, back stairs, back way, bypass, byway, detour, side door, side road
- back talk, acknowledgement, answer, answering, antiphon, back answer, cheek, comeback, echo, evasive reply, guff, impudence, insolence, jaw, lip, mouth
- back to back, as one, as one man, at opposite extremes, behind, behind the scenes, collectively, communally, concertedly, concordantly, concurrently, conjointly, contrariwise, contrary, cooperatively, counter
