haemorrhoid vs piles

haemorrhoid and piles both are nouns.

Word	Noun	Adjective	Verb	Adverb
haemorrhoid	Yes	No	No	No
piles	Yes	No	No	No

As nouns, haemorrhoid and piles are synonyms defined as:

haemorrhoid and piles: venous swelling external or internal to the anal sphincter

Other synonyms of haemorrhoid include hemorrhoid.

haemorrhoid (noun)	piles (noun)
venous swelling external or internal to the anal sphincter	a large number or amount
	venous swelling external or internal to the anal sphincter