As adjectives the difference between purtiest and hurtiest
is that purtiest is (purty) while hurtiest is (hurty).
purtiest
English
Adjective
(head)
(purty) purty
English
Adjective
(er)
(informal)
* {{quote-book
, year=1939
, author=(John Steinbeck)
, title=(The Grapes of Wrath)
, chapter=22
, passage=Seen a purty' girl down the road. Give her a big wink, too. ' Purty as hell, too.}} hurtiest
English
Adjective
(head)
(hurty) hurty
English
Adjective
(er)
That hurts.