Letter: f
- foundation garment, advocate, arm, athletic supporter, back, backbone, backing, bandeau, bearer, bra, brace, bracer, bracket, brassiere, buttress, cane
- foundation stone, cornerstone, headstone, keystone, quoin
- foundation stop, English horn, bassoon, cello, clarinet, clarion, cornet, diapason, mixture, oboe, octave, organ stop, piccolo, principal, rank, reed stop
- foundation, a priori principle, affirmation, alpha, anchorage, appanage, arrangement, assertion, assumed position, assumption, axiom, basal, base, baseboard, basement, basic
- foundational, aboriginal, basal, basic, beginning, bottom, budding, creation, elemental, elementary, embryonic, foetal, formative, foundation, fundamental, inaugural
- founded on, absolute, adducible, admissible, authentic, based on, bolstered, borne, braced, buttressed, certain, circumstantial, conclusive, convincing, cumulative, damning
- founder, abort, ancestors, apprentice, architect, artificer, artist, author, be clobbered, be destroyed, be felled, be lost, be staggered, be stricken, beginner, break down
- foundered, aground, castaway, grounded, high and dry, marooned, on the rocks, stranded, stuck, swamped, wrecked
- founding, casting, engraving, establishment, formation, foundation, institution, modelling, moulding, relief, sculptor, start, statuary, whittling, wood carving
- foundling, bonus, buried treasure, cast-off, castaway, derelict, discard, discovery, find, finding, flotsam, flotsam and jetsam, gravy, jetsam, junk, orphan
- foundry proof, blue, blueprint, galley, proof, pull, revise, slip
- foundry, forge, furnace, metalworks, mill, plant, steelworks
- fount, bonanza, cornucopia, flush, font, fountain, fountain-head, germ, geyser, gold mine, gush, head, headwater, lode, mainspring, mine
- fountain syringe, aerosol, atomizer, douche, enema, nozzle, shower, spray, sprinkler, syringe, watering can
- fountain, ascension, ascent, bob up, bonanza, break water, clamber, climb, climbing, cornucopia, elevation, float up, flush, fly up, font, fount
- fountain-head, font, fount, fountain, head, headwater, inception, mainspring, mine, origin, provenance, quarry, root, source, spring, well
- four and twenty, boxcars, dozen, eleven, fortnight, fourscore, nonagenarian, octogenarian, score, septuagenarian, sexagenarian, teens
- four bits, cent, century, copper, dime, dollar, fin, fish, grand, mill, nickel, penny, quarter, red cent, skin, two bits
- four, four-square, foursome, quadrangle, quadrilateral, quadruped, quartet, quaternary, rectangle, square, square dance, squaring
- four-channel stereo system, Gramophone, PA, PA system, bitch box, cartridge, intercom, jukebox, monaural system, mono, needle, phonograph, pick-up, record changer, record player, sound truck
- four-flush, act, affect, assume, beguile, bitch, bluff, bunk, counterfeit, cover up, deceive, fake, feign, gammon, let on, make believe
- four-flushing, acting, affectation, appearance, bluff, colour, colouring, deception, delusion, disguise, dissemblance, face, false front, false show, falsity, fa?ade
- four-in-hand, collar, equipage, muffler, pair, rig, scarf, span, spike, tandem, team, tie, turnout, unicorn
- four-legged, four-square, quadrilateral, quadruped, quaternary
- four-masted bark, galleon, junk, sailing vessel, vessel, yacht
- four-master, galleon, junk, sailing vessel, vessel, yacht
- four-poster, bed, cot, cradle, crib
- four-rayed, four-square, quadrilateral, quadruped, quaternary
- four-square, aboveboard, authentic, cube-shaped, cubed, cubic, cuboid, diced, fair and square, four, four-legged, four-rayed, genuine, good-faith, oblong, on the level
- four-star general, OD, aide, brass, brigadier, captain, colonel, commandant, commander, executive officer, general, lieutenant, major, marshal, officer, subaltern
