We don't have synonyms for skils yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are skill, skins and skis.
(n) :
Obsolete spelling of skill. [A capacity to do something well; a technique, an ability, usually acquired or learned, as opposed to abilities that are regarded as innate.]
(n) :
Obsolete spelling of skill. [A capacity to do something well; a technique, an ability, usually acquired or learned, as opposed to abilities that are regarded as innate.]