boil vs bubble over

boil is a noun but bubble over is not a noun.

Word	Noun	Adjective	Verb	Adverb
boil	Yes	No	Yes	No
bubble over	No	No	Yes	No

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

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

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

boil (verb)	bubble over (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
bring to, or maintain at, the boiling point
be in an agitated emotional state
be agitated