Verb (used without object) : When the water boils, add the meat and cabbage. ,The sea boiled in the storm. ,The kettle is boiling. The vegetables are boiling.    From Dictionary.com. 

Verb (used with object) : Boil two cups of water. ,to boil eggs.    From Dictionary.com. 

Noun : He brought a kettle of water to a boil.    From Dictionary.com.