We don't have synonyms for vigors yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are vigor, rigors and vigoro.
(n) :
(American spelling) Alternative form of vigour. [Active strength or force of body or mind; a capacity for exertion, physically, intellectually, or morally; energy.]
(n) :
(American spelling) Alternative form of vigour. [Active strength or force of body or mind; a capacity for exertion, physically, intellectually, or morally; energy.]