mortarboard
Word family nounmortarmortarboard
College
mor·tar·board /ˈmɔːtəbɔːd $ ˈmɔːrtərbɔːrd/ noun [countableC] 
SECa black cap with a flat square top worn by members of some universities on formal occasions 学士帽，学位帽 →5 see picture at 见图 hat- windowsill
- windowsills
- windowss
- window–dress
- windpipe
- windpipes
- wind resistance
- winds
- wind sb around little finger
- wind sb around your little finger
- Windscale
- windscreen
- windscreens
- windscreen-wiper
- windscreen wiper
- windscreenwiper
- windscreen wipers
- windscreen-wipers
- windshield
- windshields
- windshield-wiper
- windshield wiper
- windshieldwiper
- windshield wipers
- windsock