bicentennial

noun 0.694

quincentenary

noun 0.671

tricentennial

noun 0.656

centennial

noun 0.654

bicentenary

noun 0.640

quadricentennial

noun 0.639

centenary

noun 0.620

tercentenary

noun 0.596

half-century

noun 0.545

quinquennial

noun 0.540

sesquioxide

noun 0.536

five-hundredth

noun 0.535

seventy-fifth

noun 0.532

sesquipedalian

noun 0.531

quarter-century

noun 0.526

centenarian

noun 0.515

century

noun 0.512

sesquiterpene

noun 0.508

semiannual

noun 0.504