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

Hypernym(s): globule

· a speculative scheme that depends on unstable factors that the planner cannot control; "his proposal was nothing but a house of cards"; "a real estate bubble"

Synonym(s): house_of_cards

Hypernym(s): scheme, strategy

· an impracticable and illusory idea; "he didn't want to burst the newcomer's bubble"

Hypernym(s): illusion, fantasy, phantasy, fancy

· a dome-shaped covering made of transparent glass or plastic

Hypernym(s): covering

· form, produce, or emit bubbles; "The soup was bubbling"

Hypernym(s): emit, breathe, pass_off

· flow in an irregular current with a bubbling noise; "babbling brooks"

Synonym(s): ripple, babble, guggle, burble, gurgle

Hypernym(s): sound, go

· rise in bubbles or as if in bubbles; "bubble to the surface"

Hypernym(s): rise, lift, arise, move_up, go_up, come_up, uprise

· cause to form bubbles; "bubble gas through a liquid"

Hypernym(s): change, alter, modify

· expel gas from the stomach; "Please don't burp at the table"

Synonym(s): burp, belch, eruct

Hypernym(s): emit, breathe, pass_off