As nouns the difference between partner and pardner
is that partner is someone who is associated with another in a common activity or interest while pardner is a friend or companion (used primarily in direct address to the same).
Do cowboys say partner or pardner?
"Partner" means companion or friend. Yeah, "howdy pardner" is a stereotypical Texan cowboy accent.
Is Pardner a slang?
noun U.S. Dialect. (in direct address) friend.