A really fast thesaurus... with lots of synonyms.
We don't have synonyms for biennium yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are biennial, blennius and triennium.
We don't have any synonyms for biennium yet.
Think biennium belongs in the thesaurus? Recommend it and we'll take a look.