We don't have synonyms for dunce hat yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are dunce cap.
(n) :
(historical) A conical hat that a school pupil is made to wear to indicate that he/she is a dunce.
(n) :
(topology) The topological space obtained by identifying the sides comprising the boundary of a triangle, two sides with consistent orientation and the third with the reverse orientation.
(n) :
(historical) A conical hat that a school pupil is made to wear to indicate that he/she is a dunce.
(n) :
(topology) The topological space obtained by identifying the sides comprising the boundary of a triangle, two sides with consistent orientation and the third with the reverse orientation.