godan verb (-ku), transitive verb, intransitive verb
Used for liquids, steam, smoke, or flames forcefully coming out. Can be transitive (something emits) or intransitive (something gushes out). The 'boil over' sense is a specific intransitive use for liquids overflowing while boiling.
火山が煙を噴いている。
The volcano is emitting smoke.
やかん
The water in the kettle boiled over.