We don't have synonyms for haemorrhoid yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are Haemorrhoids and hemorrhoid.
(n) :
(British spelling) Alternative spelling of hemorrhoid. [(pathology, often in the plural) An engorged, dilated and easily broken varicosity in the perianal area, often accompanied by intense itching and throbbing pain: piles.]
(n) :
(British spelling) Alternative spelling of hemorrhoid. [(pathology, often in the plural) An engorged, dilated and easily broken varicosity in the perianal area, often accompanied by intense itching and throbbing pain: piles.]