undecennary

Fetched 2026-10-26 (cache).

Synonyms: decennary

Antonyms: decennary

Related words from Datamuse; suggestions, not definitions.

Adjective

1. {{lb|en|rare}} Once every [[eleven]] [[year]]s; [[undecennial]].

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.