1. (n.) A boiling or bubbling up of a liquid; the motion produced in a liquid by its rapid conversion into vapor.

2. (n.) Effervescence occasioned by fermentation or by any other process which causes the liberation of a gas or an aeriform fluid, as in the mixture of an acid with a carbonated alkali.

3. (n.) A sudden burst or violent display; an outburst; as, an ebullition of anger or ill temper.

ado agitation bluster bobbery boil boiling brawl broil brouhaha bubbliness bubbling bustle cacophony carbonation chaos churn coction commotion conturbation decoction discomposure disorder disquiet disquietude disturbance ebullience ebulliency ebulliometer eddy effervescence effervescency embroilment excitement fanaticism feery-fary ferment fermentation fever feverishness fidgets fizz fizzle flap flurry fluster flutteration foaming foment fomentation foofaraw frenzy frothiness frothing fume furor furore fury fuss hubbub hurly-burly hurry hurry-scurry inquietude jitters jumpiness maelstrom malaise moil nerviness nervosity nervousness pandemonium passion pell-mell perturbation racket rage restlessness roil rout row ruckus ruffle rumpus seethe seething simmer simmering sparkle spumescence stewing stir storminess swirl swirling tempestuousness to-do trepidation trepidity tumult tumultuation tumultuousness turbidity turbulence turmoil twitter unease unrest uproar upset vortex whirl wildness yeastiness zeal zealousness