rigol or rigoll /rigˈəl/

1. A gutter or water channel
2. A groove, esp an encircling groove
3. A circlet (Shakespeare)

• dull-witted
• dully
• dulness
• dulnesses
• dulocracies
• dulocracy
• duloses
• dulosis
• dulotic
• dulse
• dulses
• duly
• duma
• dumaist
• dumaists
• dumas
• dumb
• dumb-ass
• dumb-asses
• dumb-bell
• dumb-bells
• dumb blonde
• dumb blondes
• dumb-cane
• dumb-cluck