Letter: m
- main feature, feature, lead item, leader, special
- main features, configuration, contour, delineation, features, figuration, figure, framework, gestalt, lineaments, lines, outline, profile, relief, silhouette, skeleton
- main force, authority, beef, black power, brute force, charge, charisma, clout, cogency, compulsion, dint, drive, duress, effect, effectiveness, energy
- main interest, area, bag, field, forte, line, long suit, manner, metier, pursuit, speciality, specialization, strong point, style, technicality, thing
- main line, branch, cable railway, cog railway, electric railway, elevated, elevated railway, embankment, feeder, feeder line, gravity-operated railway, horse railway, junction, light railway, line, metro
- main office, base, base of operations, booking office, box office, branch, branch office, cabinet, central administration, central office, central station, centre of authority, chambers, chancellery, chancery, closet
- main plant, armoury, arsenal, assembly line, boatyard, brewery, dairy, distillery, dockyard, factory, industrial park, mill, mint, packing house, plant, pottery
- main point, basis, bench mark, burden, cardinal point, case, chapter, chief thing, climax, concern, core, cornerstone, crisis, critical point, crux, essence
- main road, alley, arterial, artery, avenue, blind alley, boulevard, bypass, byway, causeway, close, court, crescent, dike, drive, driveway
- main sea, deep, drink, high seas, hydrosphere, main, ocean depths, salt water, sea, tide
- main sequence star, black hole, magnitude, nova, population, pulsar, quasar, supernova
- main strength, authority, beef, black power, brute force, charge, charisma, clout, cogency, compulsion, dint, drive, duress, effect, effectiveness, energy
- main thing, bench mark, climax, core, cornerstone, crisis, critical point, crux, essence, essential, fundamental, gist, gravamen, heart, issue, kernel
- main, Europe, absolute, all-absorbing, arch, awful, banner, basic, big, big drink, biggest, blue, blue water, brine, briny, brute
- mainland, Europe, landmass, main, peninsula
- mainlining, antitoxin, bag, bang, booster, booster dose, booster shot, deck, dose, draft, dropping, drug packet, fix, hit, hypodermic, hypodermic injection
- mainly, a fortiori, aborigine, above all, all in all, all the more, all things considered, almost entirely, altogether, approximately, as a rule, as a whole, as an approximation, as per usual, as things go, as usual
- mains, barnyard, collective farm, croft, demesne, dude ranch, fallow, farm, farmland, farmstead, grange, grassland, hacienda, homestead, kibbutz, location
- mainspring, ambition, aspiration, basis, calling, cause, consideration, font, fount, fountain, fountain-head, goal, ground, guiding light, guiding star, headwater
- mainstay, abettor, admirer, advocate, afford support, aficionado, angel, apologist, arm, athletic supporter, back, back up, backbone, backer, backing, bandeau
- mainstream jazz, acid rock, bebop, bop, dance, hard rock, jazz, jive, rag, ragtime, rhythm-and-blues, rock, suite, swing, syncopation
- mainstream, bearing, course, current, direction, drift, glacial movement, line, main current, motion, movement, run, set, stream, swing, tenor
- maintain connection, approach, communicate with, contact, correspond, get to, interrogate, make advances, make up to, question, raise, reach, relate, reply, respond to
- maintain continuity, chain, concatenate, connect, continue, join, link, run on, string, thread
- maintain, abide, accommodate, account as, advocate, affirm, afford, afford support, allege, allege in support, announce, annunciate, answer, argue, argue for, assert
- maintained, based on, borne, founded on, grounded on, held, sustained
- maintainer, abettor, admirer, advocate, aficionado, angel, apologist, arm, back, backbone, backer, backing, bandeau, bearer, bra, brace
- maintaining, bearing, bracing, burdened, carrying, holding, maintenance, supporting, supportive, sustaining, tenacious
- maintenance man, cobbler, doctor, fixer, mechanic, serviceman, tinker
- maintenance, TLC, age, aid, alimony, allowance, antiquity, backing, bottling up, bread, care, carriage, carrying, conservancy, conservation, conservationism
