Joker and Jester are funny entertainers. A joker is a funny character mostly found in circus, while a jester is a person who was employed to entertain the royals in older times.

Joker and Comedian are entertainers, while a joker is one who makes fun of other to amuse and entertain audience, whereas a comedian is one who does comedy to make audience laugh.

Joker and Clown are considered to be the same, but they are not, as they differ in their functions. Usually, ‘jokers’ make fun of others or someone else, while ‘clowns’ make fun of themselves.