What is another word for "happen"?

Roget's Thesaurus (1911) lists these synonyms for "happen": about, according, accordingly, adventitious, after, all, approach, are, attitude, attribution, await, being, beyond, brewing, case, causation, certain, certainly, chance, circumstance, circumstantial, close, come, coming, conditional, conditionally, conjunctive, context, contingency, contingent, crisis, critical, death, dependence, destiny, distance, doom, embryo, emergence, emergency.