What is another word for "epidemic"?

Roget's Thesaurus (1911) lists these synonyms for "epidemic": about, abroad, all, always, and, anybody, average, azotic, besetting, better, broad, catching, catholic, catholical, catholicism, catholicity, collective, common, comprehensive, contagion, contagious, covered, customary, deadly, death, deleterious, dispersed, dragnet, ecumenical, encyclopedical, epizootic, every, everybody, everyone, for, general, generality, generalization, generalize, generally.