What is another word for "collision"?

Roget's Thesaurus (1911) lists these synonyms for "collision": action, against, although, and, antagonism, antagonistic, antagonize, back, beat, block, boomerang, bounce, bound, check, clash, coefficient, compensate, compensation, conflict, conflicting, contrariety, contrary, contravene, contrecoup, counter, counteract, counteraction, counterpoise, cross, direction, echo, elastic, elasticity, equal, every, fly, for, force, friction, hinder.