We don't have synonyms for trochus yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are tochus, trophus and troches.
(n) :
(malacology) Any member of the genus Trochus, or more generally of the family Trochidae; in non-specialist usage, including species formerly classified in that family, particularly Tectus niloticus.
(n) :
(malacology) Any member of the genus Trochus, or more generally of the family Trochidae; in non-specialist usage, including species formerly classified in that family, particularly Tectus niloticus.