vicennial /vī-senˈyəl/

1. Lasting, or coming at the end of, twenty years
2. Occurring every twenty years

• conserves
• conserving
• consider
• considerable
• considerableness
• considerably
• considerance
• considerances
• considerate
• considerately
• considerateness
• consideratenesses
• consideration
• considerations
• considerative
• consideratively
• considered
• considering
• consideringly
• considers
• consigliere
• consign
• consignable
• consignation
• consignations