rarified, exalted, highbrow, leisured, cloistered, upper crust, hoi polloi, stuffier, snootiest, genteel, posh, hallowed, tonier, stratospheric, swank, workaday, recondite, plebeian, esoteric, ritzy, snobbish, moneyed, clubby, middlebrow, ivory tower, luxe, sybaritic, loftier, glamorous, outre, salubrious, stodgiest, sniffy, plebian, haut monde, aristocratic, humdrum, earthiest, monied, quotidian, unostentatious, unprepossessing, haute cuisine, fabled, beau monde, illimitable, abstruse, decorous, uncongenial, swanky, haughtiest, de luxe, vertiginous, highfalutin, cosmopolitan, affluent, heady, clubbable, opulent, clubbish, avant garde, voguish, worldly, hurly burly, serene, autodidactic, modish, pricey, snobby, arcane, peculiar, averageness, exquisite, mythic, lordly, ineffable, gilded, vinous, chicest, placeless, epicurean, cosmopolite, peerless, bucolic, solipsistic, upwardly mobile, dantean, lit crit, wondrous, nonpareil, sylvan, nouveau riche, oenological, desirable, mozartean, idiosyncratic, haute couture, raffish, fancy, pretentious, enviable, prosaic, ethereal, nebulous, etherial, incompressible, compressible, etheric, supercooled, denser, homogeneous, inhomogeneous, quiescent, unreal, colder, ionized, nonhomogeneous, unexcited, constricted, unconfined, uncontaminated

interplanetary gas

high-flown, high-minded, idealistic, lofty, noble, noble-minded, rare, reserved, thin