We don't have synonyms for horseface yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are horseback, horserace and arseface.
(n) :
A face (of a human or other non-horse animal) that is long and ugly, with coarse features, thus having a resemblance or fancied resemblance to the face of a horse.
(n) :
(by extension) Someone who is unattractive because they have a horseface.
(n) :
A face (of a human or other non-horse animal) that is long and ugly, with coarse features, thus having a resemblance or fancied resemblance to the face of a horse.
(n) :
(by extension) Someone who is unattractive because they have a horseface.