Uncontrollable, a.
1. Incapable of being controlled; ungovernable; irresistible; as, an uncontrollable temper; uncontrollable events.
2. Indisputable; irrefragable; as, an uncontrollable maxim; an uncontrollable title. [R.] Swift. -- Un`con*trol"la*ble*ness, n. -- Un`con*trol"la*bly, adv.
Shades of meaning
Fernald has no entry of its own for uncontrollable; he lists it under rebellious.
He lists it without comment; the entries above explain its neighbors.