countersink

noun 0.739

bore

noun 0.639

borehole

noun 0.611

clearance hole

noun 0.585

drill bit

noun 0.581

borewell

noun 0.574

pilot hole

noun 0.572

corer

noun 0.571

coring

noun 0.564

counterfort

noun 0.539

counterblow

noun 0.538

borescope

noun 0.537

boresight

noun 0.537

chamfer

noun 0.534

countershaft

noun 0.531

chamfering

noun 0.531

mortise

noun 0.528

broach

noun 0.525

blasthole

noun 0.522

twist drill

noun 0.520

cutterhead

noun 0.517

burrow

noun 0.517

cavity

noun 0.516

drilling

noun 0.515

drill press

noun 0.514

core loss

noun 0.514

wellbore

noun 0.512

drill

noun 0.511

core sample

noun 0.509

overcut

noun 0.508

set screw

noun 0.504

concave

noun 0.500