Noun

• S: (n) callosity, callus (an area of skin that is thick or hard from continual pressure or friction (as the sole of the foot))
• S: (n) callus (bony tissue formed during the healing of a fractured bone)
• direct hyponym / full hyponym
• direct hypernym / inherited hypernym / sister term
• S: (n) callus ((botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchid)

Verb

• S: (v) callus (cause a callus to form on) "The long march had callused his feet"
• S: (v) callus (form a callus or calluses) "His foot callused"