We don't have synonyms for lacker yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are locker, backer and lackey.
(n) :
Obsolete spelling of lacquer. [A glossy, resinous material used as a surface coating; either a natural exudation of certain trees, or a solution of nitrocellulose in alcohol, etc.]
(v) :
Obsolete spelling of lacquer. [To apply a lacquer to something or to give something a smooth, glossy finish.]
(n) :
Obsolete spelling of lacquer. [A glossy, resinous material used as a surface coating; either a natural exudation of certain trees, or a solution of nitrocellulose in alcohol, etc.]
(v) :
Obsolete spelling of lacquer. [To apply a lacquer to something or to give something a smooth, glossy finish.]