Verbs

(v)hum, buzz, seethebe noisy with activity“This office is buzzing with activity”
(v)seethe, boilbe in an agitated emotional state“The customer was seething with anger”
(v)seethefoam as if boiling“a seething liquid”
(v)seethe, rollboil vigorously“The liquid was seething”, “The water rolled”