Letter: s
- sea lane, air lane, approaches, beat, channel, circuit, course, fairway, flight path, itinerary, line, orbit, path, primrose path, road, round
- sea lawyer, advocate, agent, attorney, barrister, counsel, counsellor, deputy, friend at court, intercessor, legal counsellor, mouthpiece, pleader, proctor, procurator, solicitor
- sea lentil, algae, bean, bracken, climber, creeper, fern, grapevine, herb, ivy, kelp, legume, lichen, moss, mould, moulder
- sea level, earth, esplanade, flat, flatland, floor, ground, horizontal, ledge, level, parterre, plain, plane, platform, prairie, steppe
- sea mail, airmail, correspondence, express, frank, letter, mail, mailing list, parcel post, post, special delivery
- sea margin, bank, beach, berm, coast, embankment, lido, littoral, riverside, sea coast, seashore, seaside, shingle, shore, strand, tidewater
- sea monster, cetacean, dolphin, fish, fry, kipper, marine animal, plankton, porpoise, salmon, sea serpent, shark, sponge, whale
- sea moss, algae, bean, bracken, climber, creeper, fern, grapevine, herb, ivy, kelp, legume, lichen, moss, mould, moulder
- sea nymph, Davy Jones, Neptune, deity, god, goddess, mermaid, naiad, nix, siren, water sprite
- sea of flames, backfire, beacon, blaze, combustion, conflagration, fire, flame, flicker, fox fire, ignition, pyre
- sea of grass, earth, esplanade, flat, flatland, floor, ground, horizontal, ledge, level, parterre, plain, plane, platform, prairie, steppe
- sea of troubles, ado, affliction, aggravation, annoyance, anxiety, bitter pill, blight, bother, bummer, burden, care, cross, curse, difficulties, difficulty
- sea pig, cetacean, dolphin, fish, fry, kipper, marine animal, plankton, porpoise, salmon, sea serpent, shark, sponge, whale
- sea robber, buccaneer, rover, sea dog, sea rover
- sea room, air space, blank check, carte blanche, clearance, elbowroom, field, free hand, full scope, full swing, latitude, leeway, margin, play, range, room
- sea rover, Flying Dutchman, Neptune, OD, able seaman, able-bodied seaman, aeroplane hijacker, air pirate, bluejacket, buccaneer, corsair, deep-sea man, fair-weather sailor, fisherman, freebooter, hearty
- sea serpent, cetacean, dolphin, fingerling, fish, fry, game fish, grilse, kipper, man-eater, man-eating shark, marine animal, minnow, plankton, porpoise, salmon
- sea snake, cetacean, dolphin, fish, fry, kipper, marine animal, plankton, porpoise, salmon, sea serpent, serpent, shark, snake, sponge, viper
- sea travel, boating, canoeing, cruising, navigation, rowing, sailing, seafaring, steaming, yachting
- sea trip, course, crossing, cruise, leg, passage, run, sail, voyage
- sea water, head, hydrosphere, rain, salt water, steam, water, water vapour
- sea wolf, buccaneer, rover, sea dog, sea rover
- sea wrack, algae, bean, bracken, climber, creeper, fern, grapevine, herb, ivy, kelp, legume, lichen, moss, mould, moulder
- sea, abundance, acres, bags, barrels, big drink, billow, blue, blue water, bore, breakers, brine, briny, bushel, chop, choppiness
- sea-kindly, bold, cosy, snug, stiff, tender, waterproof, watertight
- sea-maid, Davy Jones, Neptune, deity, god, goddess, mermaid, naiad, nix, siren, water sprite
- sea-maiden, Davy Jones, Neptune, deity, god, goddess, mermaid, naiad, nix, siren, water sprite
- seaboard, bank, beach, berm, coast, embankment, lido, littoral, riverside, sea coast, seashore, seaside, shingle, shore, strand, tidewater
- seafarer, Flying Dutchman, Neptune, OD, able seaman, able-bodied seaman, bluejacket, buccaneer, deep-sea man, fair-weather sailor, fisherman, hearty, jack, jack afloat, jack-tar, mariner
- seafaring man, Flying Dutchman, Neptune, OD, bluejacket, buccaneer, fisherman, hearty, jack, navigator, pirate, privateer, sailor, salt, sea dog, sea rover
