We don't have synonyms for bambou yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are bamboo and bambu.
(n) :
(uncommon) Alternative form of bamboo. [A fast-growing grass of the Bambusoideae subfamily, characterised by its woody, hollow, round, straight, jointed stem.]
(n) :
(uncommon) Alternative form of bamboo. [A fast-growing grass of the Bambusoideae subfamily, characterised by its woody, hollow, round, straight, jointed stem.]