school (esp. BrE), shower, skull (usually skullcap), stocking (AmE), trucker (AmE)
ball (AmE), baseball, bathing, cricket, ski (esp. AmE), swim (AmE), swimming (esp. BrE)
cloth (esp. BrE)
flat, peaked (both esp. BrE)
dunce (AmE), dunce's (BrE)

doff (old-fashioned), tip

badge (BrE)

bottle (esp. AmE), hub, lens
filler (esp. BrE), gas (AmE)
screw
The bottle has a screw cap.

put on, screw on
Put the cap back on the pen.

remove, take off, unscrew