We don't have synonyms for trochar yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are trochal, trocar and trocha.
(n) :
(surgery) Alternative form of trocar. [A pointed hollow cylindrical device used to make small incisions and surgically insert cannulas, etc., into body cavities, or to aspirate fluids.]
(n) :
(surgery) Alternative form of trocar. [A pointed hollow cylindrical device used to make small incisions and surgically insert cannulas, etc., into body cavities, or to aspirate fluids.]