Synonyms for Boil over:

n.

break down, bake, bubble, boil up, cloud, clear, atomize, boil away. deepen, deteriorate, descend into, go down, decline, spiral, worsen, slip into, degenerate, escalate. boil over (noun)
overboil.

v.

change (verb)
overboil.

Other synonyms:

boil up, atomize, boil away, bubble, bake. break down. cloud. clear. Other relevant words:
bubble.