Letterora

Crossword clue: occurring once every 20 years

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

vicennial 9 letters wn-def

occurring once every 20 years

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Similar clues

occurring or payable every year 60% similar → yearly
of or pertaining to thirty years; consisting of thirty years; occurring once in every thirty years. 57% similar → tricennial
every hundred years; once in a century 50% similar → centennially
occurring every third year or lasting 3 years 50% similar → triennial
occurring once in every three hours. 50% similar → trihoral

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