We don't have synonyms for hetaera yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are hetaira.
"1980: Christ appeared, only to reveal himself as the naked god Pan. Ballet of hetaerae and houris, choreography by Italo Castaldi. -- Anthony Burgess, Earthly Powers"
"1980: Christ appeared, only to reveal himself as the naked god Pan. Ballet of hetaerae and houris, choreography by Italo Castaldi. -- Anthony Burgess, Earthly Powers"