Nouns

(n)boil, furunclea painful sore with a hard core filled with pus
(n)boiling point, boilthe temperature at which a liquid boils at sea level“they brought the water to a boil”

Verbs

(v)boilcome to the boiling point and change from a liquid to vapor“Water boils at 100 degrees Celsius”
(v)boilimmerse or be immersed in a boiling liquid, often for cooking purposes“boil potatoes”, “boil wool”
(v)boilbring to, or maintain at, the boiling point“boil this liquid until it evaporates”
(v)churn, boil, moil, roilbe agitated“the sea was churning in the storm”
(v)seethe, boilbe in an agitated emotional state“The customer was seething with anger”