| -enni, -ennial, -ennium (Latin: a suffix; year, years).bicentennial: biennial: biennium: centennial: centennium: decennary: decennial: decennium: duodecennial: millennial: millennium: novennial: octennial: perennial: quadrennial: quadrennium: quadricentennial: quincentennial: quindecennial: quinquenniad: quinquennial: quinquennium: semicentennial: septennary: septennate: septennial: septennium: sesquicentennial: sexennial: sexennium: tercentennial: tricennial: tricentennial: triennial: triennium: undecennial: vicennial: |