• (of a liquid) boil or be turbulent as if boiling

Synonyms: boil, bubble, simmer, foam, froth, rise, ferment, fizz, effervesce, teem, swarm, boil, bubble, foam, ferment, swirl, convulse, churn, whirl, surge

• (of a person) be filled with intense but unexpressed anger

Synonyms: be angry, be furious, be enraged, be incensed, be infuriated, be beside oneself, have lost one's temper, have/throw a fit, boil, simmer, be boiling over, chafe, rage, be in a rage, rant, rave, rant and rave, storm, fume, smoulder, spit, breathe fire, burn

• (of a place) be crowded with people or things moving about in a rapid or hectic way