We don't have synonyms for bimini yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are bikini, rimini and cimini.
°A lightweight cover, usually made of fabric stretched on a metal frame which is readily removable, for the cockpit or deck of a speedboat or sailboat.
°A lightweight cover, usually made of fabric stretched on a metal frame which is readily removable, for the cockpit or deck of a speedboat or sailboat.