decennial
1 synonym for decennial, grouped by meaning and by how common each one is.
Noun — Another word for a decade, a period of ten years.
Synonyms
Everyday swaps
Common words most readers know — safe in any writing.
Etymology
Traces to Latin decennialis, from decennium ("10-year period") plus -ālis; decennium in turn comes from decennis ("10-year") plus -ium ("-ium", a suffix forming abstract nouns), which goes back to decem ("ten") plus annus ("year") plus -is (a suffix forming compound adjectives).
Full origin of decennial →