cap and gown. the hat is called a mortarboard.
a leperchaun's hat :P
It's called a homburg hat
Its called a hat box
According to Irish folklore, it's called a cocked hat.
A guardsman hat is called 'Bear Skin'
Its called a Tri-Corn Hat
a hat is called 'un chapeau' (masc.) in French.
a pilgrim hat is called a pilly hat
they were called the do-nothing-kings
Conical Asian hat, sedge hat, rice hat, paddy hat or coolie hat.
cloche hat