boil vs roil

boil is a noun but roil is not a noun.

Word	Noun	Adjective	Verb	Adverb
boil	Yes	No	Yes	No
roil	No	No	Yes	No

As verbs, boil and roil are synonyms defined as:

Other synonyms of boil include churn, moil.

boil (noun)	roil (noun)
the temperature at which a liquid boils at sea level
a painful sore with a hard core filled with pus

boil (verb)	roil (verb)
immerse or be immersed in a boiling liquid, often for cooking purposes	make turbid by stirring up the sediments of
come to the boiling point and change from a liquid to vapor	be agitated
bring to, or maintain at, the boiling point
be in an agitated emotional state
be agitated