A hollow globule of gas (e.g., air or carbon dioxide).

Roget 353: bubble, foam, froth, head, spume, lather, suds, spray, surf, yeast, barm^†, spindrift.    cloud, vapor, fog, mist, haze, steam, geyser; scud, messenger, rack, nimbus; cumulus, woolpack^†, cirrus, stratus; cirrostratus, cumulostratus; cirrocumulus; mackerel sky, mare's tale, dirty sky; curl cloud; frost smoke; thunderhead.    [Science of clouds] nephelognosy^†; nephograph^†, nephology^†.    effervescence, fermentation; bubbling etc. v.. nebula; cloudliness etc. (opacity) 426^†; nebulosity etc. (dimness) 422.    ... show more

Roget 545: deception; falseness etc. 544; untruth etc. 546; imposition, imposture; fraud, deceit, guile; fraudulence, fraudulency^†; covin^†; knavery etc. (cunning) 702; misrepresentation etc. (falsehood) 544; bluff; straw-bail, straw bid [U.S.]; spoof [Slang].    delusion, gullery^†; juggling, jugglery^†; slight of hand, legerdemain; prestigiation^†, prestidigitation; magic etc. 992; conjuring, conjuration; hocus-pocus, escamoterie^†, jockeyship^†; trickery, coggery^†, chicanery; supercherie^†, cozenage^†, circumvention, ingannation^†, collusion; treachery etc. 940; practical joke.    trick, cheat, wile, blind, feint, plant, bubble, fetch, catch, chicane, juggle, reach, hocus, bite; card sharping, stacked deck, loaded dice, quick shuffle, double dealing, dealing seconds, dealing from the bottom of the deck; artful dodge, swindle; tricks upon travelers; stratagem etc. (artifice) 702; confidence trick, fake, hoax; theft etc. 791; ballot-box stuffing [U.S.], barney [Slang]; brace game [Slang], bunko game, drop game [Slang], gum game [U.S.], panel game [U.S.], shell game, thimblerig, skin game [U.S.].    snare, trap, pitfall, decoy, gin; springe^†, springle^†; noose, hoot; bait, decoy-duck, tub to the whale, baited trap, guet-a-pens; cobweb, net, meshes, toils, mouse trap, birdlime; dionaea^†, Venus's flytrap^†; ambush etc. 530; trapdoor, sliding panel, false bottom; spring-net, spring net, spring gun, mask, masked battery; mine; flytrap^†; green goods [U.S.]; panel house.    Cornish hug; wolf in sheep's clothing etc. (deceiver) 548; disguise, disguisement^†; false colors, masquerade, mummery, borrowed plumes; pattes de velours [Fr.].    mockery etc. (imitation) 19; copy etc. 21; counterfeit, sham, make-believe, forgery, fraud; lie etc. 546; a delusion a mockery and a snare" [Denman], hollow mockery.    whited sepulcher, painted sepulcher; tinsel; paste, junk jewelry, costume jewelry, false jewelry, synthetic jewels; scagliola^†, ormolu, German silver, albata^†, paktong^†, white metal, Britannia metal, paint; veneer; jerry building; man of straw.    illusion etc. (error) 495; ignis fatuus [Lat.] etc. 423; mirage etc. 443.    ... show more

Roget 495: error, fallacy; misconception, misapprehension, misstanding^†, misunderstanding; inexactness etc. adj.; laxity; misconstruction etc. (misinterpretation) 523; miscomputation etc. (misjudgment) 481; non sequitur etc. 477; mis-statement, mis-report; mumpsimus^†.    mistake; miss, fault, blunder, quiproquo, cross purposes, oversight, misprint, erratum, corrigendum, slip, blot, flaw, loose thread; trip, stumble etc. (failure) 732; botchery etc. (want of skill) 699^†; slip of the tongue, slip of the lip, Freudian slip; slip of the pen; lapsus linguae [Lat.], clerical error; bull etc. (absurdity) 497; haplography^†.    illusion, delusion; snare; false impression, false idea; bubble; self-decit, self-deception; mists of error.    heresy etc. (heterodoxy) 984; hallucination etc. (insanity) 503; false light etc. (fallacy of vision) 443; dream etc. (fancy) 515; fable etc. (untruth) 546; bias etc. (misjudgment) 481; misleading etc. v.. ... show more

Roget 4: unsubstantiality^†, insubstantiality; nothingness, nihility^†; no degree, no part, no quantity, no thing.    nothing, naught, nil, nullity, zero, cipher, no one, nobody; never a one, ne'er a one [Contr.]; no such thing, none in the world; nothing whatever, nothing at all, nothing on earth; not a particle etc. (smallness) 32; all talk, moonshine, stuff and nonsense; matter of no importance, matter of no consequence.    thing of naught, man of straw, John Doe and Richard Roe, faggot voter; nominis umbra [Lat.], nonentity; flash in the pan, vox et praeterea nihil [Lat.].    shadow; phantom etc. (fallacy of vision) 443; dream etc. (imagination) 515; ignis fatuus [Lat.] etc. (luminary) 423; such stuff as dreams are made of" [Tempest]; air, thin air, vapor; bubble etc. 353; baseless fabric of a vision" [Tempest]; mockery.    hollowness, blank; void etc. (absence) 187.    inanity, fool's paradise.    ... show more

Roget 336: vaporization, volatilization; gasification, evaporation, vaporation^†; distillation, cupellation [Chem], cohobation, sublimination^†, exhalation; volatility.    vaporizer, still, retort; fumigation, steaming; bay salt, chloride of sodium^†.    mister, spray.    bubble, effervescence.   ' ... show more

Roget 320: levity; lightness etc. adj.; imponderability, buoyancy, volatility.    feather, dust, mote, down, thistle, down, flue, cobweb, gossamer, straw, cork, bubble, balloon; float, buoy; ether, air.    leaven, ferment, barm^†, yeast.    lighter-than-air balloon, helium balloon, hydrogen balloon, hot air balloon.    convection, thermal draft, thermal.    ... show more

Roget 193: littleness etc. adj.; smallness etc. (of quantity) 32; exiguity, inextension^†; parvitude^†, parvity^†; duodecimo^†; Elzevir edition, epitome, microcosm; rudiment; vanishing point; thinness etc. 203.    dwarf, pygmy, pigmy^†, Liliputian, chit, pigwidgeon^†, urchin, elf; atomy^†, dandiprat^†; doll, puppet; Tom Thumb, Hop-o'-my-thumb^†; manikin, mannikin; homunculus, dapperling^†, cock-sparrow.    animalcule, monad, mite, insect, emmet^†, fly, midge, gnat, shrimp, minnow, worm, maggot, entozoon^†; bacteria; infusoria^†; microzoa [Micro.]; phytozoaria^†; microbe; grub; tit, tomtit, runt, mouse, small fry; millet seed, mustard seed; barleycorn; pebble, grain of sand; molehill, button, bubble.    point; atom etc. (small quantity) 32; fragment etc. (small part) 51; powder etc. 330; point of a pin, mathematical point; minutiae etc. (unimportance) 643.    micrometer; vernier; scale.    microphotography, photomicrography, micrography^†; photomicrograph, microphotograph; microscopy; microscope (optical instruments) 445.    ... show more

Roget 111: transience, transientness etc. adj.^†; evanescence, impermanence, fugacity [Chem], caducity^†, mortality, span; nine days' wonder, bubble, Mayfly; spurt; flash in the pan; temporary arrangement, interregnum.    velocity etc. 274; suddenness etc. 113; changeableness etc. 149.    transient, transient boarder, transient guest [U.S.].    ... show more

Dutch: bel
Polish: bąbel, bąbelek, banieczka, bańka, pęcherz, pęcherzyk

A speculative scheme that depends on unstable factors that the planner cannot control:
— A real estate bubble.

synonym: house of cards.

An impracticable and illusory idea.

A dome-shaped covering made of transparent glass or plastic.

Form, produce, or emit bubbles.

Roget 336: render gaseous etc. 334; vaporize, volatilize; distill, sublime; evaporate, exhale, smoke, transpire, emit vapor, fume, reek, steam, fumigate; cohobate^†; finestill^†.    bubble, sparge, effervesce, boil.    ... show more

Flow in an irregular current with a bubbling noise.

synonyms: babble, burble, guggle, gurgle, ripple.

Roget 348: flow, run; meander; gush, pour, spout, roll, jet, well, issue; drop, drip, dribble, plash, spirtle^†, trill, trickle, distill, percolate; stream, overflow, inundate, deluge, flow over, splash, swash; guggle^†, murmur, babble, bubble, purl, gurgle, sputter, spurt, spray, regurgitate; ooze, flow out etc. (egress) 295.    rain hard, rain in torrents, rain cats and dogs, rain pitchforks; pour with rain, drizzle, spit, set in; mizzle^†.    flow into, fall into, open into, drain into; discharge itself, disembogue^†.    [Cause a flow] pour; pour out etc. (discharge) 297; shower down, irrigate, drench etc. (wet) 337; spill, splash.    [Stop a flow] stanch; dam, up etc. (close) 261; obstruct etc. 706.    ... show more

Roget 353: bubble, boil, foam, froth, mantle, sparkle, guggle^†, gurgle; effervesce, ferment, fizzle.   

Dutch: klokken

Rise in bubbles or as if in bubbles.

Cause to form bubbles.

Expel gas from the stomach.

synonyms: belch, burp, eruct.

Dutch: boer, boeren