n. 25B6; verb
the beer continues to ferment : UNDERGO FERMENTATION, brew; effervesce, fizz, foam, froth.
an environment that ferments disorder : CAUSE, bring about, give rise to, generate, engender, spawn, instigate, provoke, incite, excite, stir up, whip up, foment; poetic/literary beget, enkindle.
25B6; noun
a ferment of revolutionary upheaval : FEVER, furore, frenzy, tumult, storm, rumpus; turmoil, upheaval, unrest, disquiet, uproar, agitation, turbulence, disruption, confusion, disorder, chaos, mayhem; informal kerfuffle, hoo-ha, to-do; Brit. informal aggro.
(archaic) the action of a ferment : FERMENTING AGENT/SUBSTANCE, enzyme; yeast, bacteria, leaven.