We don't have synonyms for chaire yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are chair, chaise and chare.
(n) :
Obsolete spelling of chair. [An item of furniture used to sit on or in, comprising a seat, legs or wheels, back, and sometimes arm rests, for use by one person.]
(n) :
Obsolete spelling of chair. [An item of furniture used to sit on or in, comprising a seat, legs or wheels, back, and sometimes arm rests, for use by one person.]