29 Moby Thesaurus words for "semiyearly": annual, biannual, biennial, bimonthly, biweekly, catamenial, centenary, centennial, daily, decennial, diurnal, fortnightly, hebdomadal, hourly, menstrual, momentary, momently, monthly, quarterly, quotidian, secular, semestral, semiannual, semimonthly, semiweekly, tertian, triennial, weekly, yearly