We don't have synonyms for boat shoes yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are boat shoe, boat show and hot shoes.
(n) :
A type of casual footwear resembling a loafer, originally designed to be worn aboard a boat, characterized by water-resistant hide, soles designed to improve hold on wet deck of the boat and side lacing.
(n) :
A type of casual footwear resembling a loafer, originally designed to be worn aboard a boat, characterized by water-resistant hide, soles designed to improve hold on wet deck of the boat and side lacing.