Word Study
unstoppable
OXFORD DICTIONARY
unstoppable, adj. that cannot be stopped or prevented.
Derivative
unstoppability n. unstoppably adv.
THESAURUS
unstoppable
certain, fated, fateful, indefeasible, ineluctable, inescapable, inevasible, inevitable, inexorable, inflexible, irresistible, irrevocable, necessary, relentless, resistless, sure, sure as death, sure as fate, unavoidable, uncontrollable, undeflectable, unpreventable, unyieldingFor further exploring for "unstoppable" in Webster Dictionary Online