verb

(of a substance) undergo fermentation.

the drink had fermented, turning some of the juice into alcohol

undergo fermentation,brew,effervesce,fizz,foam,froth,bubble,seethe,boil,rise

noun

agitation and excitement among a group of people, typically concerning major change and leading to trouble or violence.

a period of political and religious ferment

fever,furore,frenzy,tumult,storm,flurry,bustle,hubbub,brouhaha,stir,fuss,stew,ruckus,clamour,turmoil,upheaval,unrest,disquiet,uproar,agitation,turbulence,hurly-burly,excitement,disruption,confusion,disorder,chaos,mayhem,hoo-ha,to-do,rumpus,kerfuffle,carry-on,aggro,argy-bargy,hoopla,moil,coil