Synonyms and related words :
annual, biannual, biennial, bimonthly, biweekly, catamenial, centenary, centennial, daily, decennial, diurnal, fortnightly, hebdomadal, hourly, momentary, momently, monthly, quarterly, quotidian, secular, semestral, semiannual, semimonthly, semiweekly, semiyearly, tertian, triennial, weekly, yearly