The difference between Chump and Dunce

When used as nouns, chump means an incompetent person, a blockhead, whereas dunce means an unintelligent person.

check bellow for the other definitions of Chump and Dunce

Chump as a noun (colloquial, pejorative):

An incompetent person, a blockhead; a loser.

Examples:

"That chump wouldn't know his ass from a hole in the ground."
Chump as a noun:

A gullible person; a sucker; someone easily taken advantage of; someone lacking common sense.

Examples:

"It shouldn't be hard to put one over on ''that'' chump."
Chump as a noun:

The thick end, especially of a piece of wood or of a joint of meat.