deep, high sea, oceanic abyss, offing, territorial water

biggest, key, major, sole, primary, twofold, predominant, central, ostensible, overriding, prime, greatest, obvious, ultimate, crucial, huge, top, only, prominent, likeliest, another, largest, closest, overarching, particular, uppermost, strongest, fundamental, topmost, one, focal, perennial, unifying, definite, dominant, thorniest, paramount, foremost, lone, important, trickiest, easiest, premier, focal point, furthest, salient, the, favorite, legitimate, principal, unstated, whole, vital, secondary, clear, real, northernmost, separate, nearest, busiest, notable, southernmost, revolve around, same, critical, popular, latter, broader, pronged, hardest, surest, smaller, singular, oldest, semicircular, distinct, logical, westernmost, basic, significant, fiercest, glaring, heaviest, usual, weightiest, grandest, commonest, rightmost, best, leakiest, thematic, sorest, strategic, underlying, essential, narrow, manifold, transalpine, adjacent, famous, massive, gigantic, entrance, inlet, chamber, sluice, pinion, aisle, gate, mains, shelf, fork, pier, sewer, sill, tank, tap, terminal, bar, bolt, branch, cipal, portant, chief, tant, definable, unmentioned, allimportant, identifiable

electric main, gas main, sewer line, sewer main, water main

., abstract, accessory, accouterment, accoutrement, acrocarp, acrocarpous moss, acrogen, acrogenic, acrogenous, adumbrate, aegean, aegean sea, affluent, aftershock, annex, annexe, anti-torque rotor, arc-boutant, arterial road, arteria axillaris, arteria brachialis, aside, atomic number 22, auxiliary, auxiliary storage, axillary artery, axis, backup, back matter, balcony, barb, barite, barium sulphate, barytes, belem, belly flop, belly flopper, belly whop, belly whopper, bell book, black cohosh, black snakeroot, bodiless, bodyless, bole, brachial artery, branch, bronchial tube, bronchus, brunt, bulk, business, calcium phosphate, canadian security intelligence service, capital of norway, capital of wisconsin, capitulation, cardinal compass point, centrum, champion lode, character, check, christiania, cimicifuga racemosa, collector's item, comoro islands, complex sentence, concordance, construction, convention, coordinate clause, corpus, corymb, countercurrent, cpu board, crosscurrent, cross street, csis, curtain raiser, cutting, cymose, denouement, derivation, descant on, detour, diapason, diapason stop, diaphysis, digress, digression, digressive, dinner, dinner plate, discursive, distributary, divagate, divagation, diversion, donjon, drogue parachute, dungeon, elaborate, electric main, ell, end matter, entremots, epilog, epilogue, epiphysis, excursion, excursive, excursus, extension, external storage, ezo, feeder, feeder line, feliz lusitania, fetus, fifth cranial nerve, fish fry, flying buttress, foetus, foliage, front matter, frustration, function call, gas fitting, gas main, girder, guesthouse, hacienda, harry sinclair lewis, heavy spar, heroine, high altar, hokkaido, homogenize, hondo, honshu, hors d'oeuvre, hyperboloid, idea, igg, iles comores, immunoglobulin g, independent, internal organ, irrawaddy, irrawaddy river, kaolinite, keel, keep, kyushu, laudanum, lay-by, layby, leaf, leafage, leftover, lewis, limb, loose sentence, lower deck, lower egypt, luzon, madison, magnetic core, mainland, main drag, main street, majority, middle ear, moneygrubber, mother board, mother lode, musculus sphincter ductus pancreatici, nervus trigeminus, newtonian reflector, newtonian telescope, nickel-base alloy, nickel alloy, north island, orchestra, oslo, outbuilding, outline, outpost, outwork, overall, oxbow lake, para, parenthesis, parquet, parquet circle, parterre, parthenon, periodic sentence, peroration, peter pan, piece de resistance, plagiocephaly, plate, pleurocarp, pleurocarpous moss, point, precis, predicate, prelim, preliminary, prelims, previous question, primary, primary feather, primary quill, pull-off, raceme, rambling, rank and file, rattle-top, real storage, recap, recapitulate, receptionist, red herring, remnant, rest area, rest stop, roadhouse, roundabout way, saida, santa maria de belem, secondary storage, segregate, segregated, serif, seriph, sewer line, sewer main, shaft, shia, shiah, shiah islam, shikoku, showpiece, sideshow, side dish, side road, side street, sidon, sinclair lewis, singaporean, sketch, sketch map, skulk, sound, south island, squeeze, st. mary of bethlehem, stalls, state, stray, subject, subordinatinga, subordinative, sum, summarize, summary, sunni, superstructure, supervisory software, sustainment, synopsis, tail, tail rotor, take, taproot, testament, text, the shiites, the sunnites, third deck, thought, thyrse, thyrsus, ti, tincture of opium, titanium, tonic, traffic lane, tree, tree branch, tree trunk, tributary, trigeminal, trigeminal nerve, trigeminus, trunk, trunk line, trunk route, tympanic cavity, tympanum, undercut, unintegrated, upper egypt, vaisya, verb phrase, vernier, vernier scale, viscus, wander, water main, weenie roast, west end, wiener roast, wing, workhorse, yezo, yogacara, zeaxanthin

base, hydrosphere, infrastructure

body of water, pipage, pipe, piping, water

briny, chief, important, independent, intense, of import, primary, principal