Definitions
1.AdjectiveDecennial: of or related to a ten-year period.
2.NounA decennium: a period of ten years.
3.AdjectiveAlternative form of decenary: of or related to the number ten; containing ten items.
4.AdjectiveAlternative form of decenary: of or related to a tithing.
5.NounAlternative form of decenary: a tithing.