triennial Synonyms

tercentennial tercentenary after second tertiary tertian septennial secular quotidian quinquennial quadrennial third trieterical sextennial biannual quincentenary aquatic plant time period 3rd 3-membered yearly perennial octennial monthly biweekly birthday bimonthly biennial bicentenary annual anniversary angiosperm catamenial centennial daily menstrual jubilee hourly hebdomadal fortnightly exotic diurnal decennial amphibian