We don't have synonyms for damaskin yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are damask, lambskin and damassin.
(v) :
Alternative form of damascene. [(transitive) To decorate (metalwork) with a peculiar marking or water produced in the process of manufacture, or with designs produced by inlaying or encrusting with another metal, such as silver or gold, or by etching, etc.; to damask.]
(v) :
Alternative form of damascene. [(transitive) To decorate (metalwork) with a peculiar marking or water produced in the process of manufacture, or with designs produced by inlaying or encrusting with another metal, such as silver or gold, or by etching, etc.; to damask.]