mortar

noun 0.652

cap and gown

noun 0.590

millboard

noun 0.589

mort

noun 0.587

mortarium

noun 0.572

mortier

noun 0.570

back board

noun 0.559

board

noun 0.549

mortar and pestle

noun 0.542

backboard

noun 0.538

headboard

noun 0.532

headmaster

noun 0.529

blackboard

noun 0.528

mainboard

noun 0.528

hardboard

noun 0.528

biretta

noun 0.525

capstone

noun 0.524

matric

noun 0.523

mouldboard

noun 0.519

moldboard

noun 0.515

cocked hat

noun 0.513

mitre

noun 0.513

posterboard

noun 0.511

top hat

noun 0.511

motherboard

noun 0.507

head covering

noun 0.505

hard hat

noun 0.505

black cap

noun 0.503