boil vs overflow

boil and overflow both are nouns.

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

As verbs, overflow is a hyponym of boil; that is, overflow is a word with a more specific, narrower meaning than boil:

Other hyponyms of boil include bubble over, spill over, ferment, sizzle.

boil (noun)	overflow (noun)
the temperature at which a liquid boils at sea level	a large flow
a painful sore with a hard core filled with pus	the occurrence of surplus liquid (as water) exceeding the limit or capacity

boil (verb)	overflow (verb)
immerse or be immersed in a boiling liquid, often for cooking purposes	overflow with a certain feeling
come to the boiling point and change from a liquid to vapor	flow or run over (a limit or brim)
bring to, or maintain at, the boiling point
be in an agitated emotional state
be agitated