We don't have synonyms for ethick yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are thick, ethics and ethic.
(adj) :
Obsolete form of ethic. [Moral, relating to morals.]
(n) :
Obsolete form of ethic. [A set of principles of right and wrong behaviour guiding, or representative of, a specific culture, society, group, or individual.]
(adj) :
Obsolete form of ethic. [Moral, relating to morals.]
(n) :
Obsolete form of ethic. [A set of principles of right and wrong behaviour guiding, or representative of, a specific culture, society, group, or individual.]