callus /kalˈəs/

1. An area of thickened or hardened skin
2. New material by which fractured bones are consolidated (pathology)
3. Soft tissue that forms over a cut surface (botany)

• bowling alleys
• bowling crease
• bowling green
• bowling greens
• bowlings
• bowl over
• bowls
• bowman
• bowmen
• bowne
• bowned
• bownes
• bowning
• bow-oar
• bow-oars
• bow out
• bowpot
• bowr
• bowrs
• bows
• bowsaw
• bowsaws
• bowse
• bowsed
• bowser