seethe in WordNet English dictionary

1. be in an agitated emotional state
   "The customer was seething with anger"
   seethe  boil 
   
2. be noisy with activity
   "This office is buzzing with activity"
   hum  buzz  seethe 
   
3. boil vigorously
   "The liquid was seething"; "The water rolled"
   seethe  roll 
   
4. foam as if boiling
   "a seething liquid"
   seethe