incrusted (?.)
- backed
- calcified
- callous
- calloused
- case-hardened
- crusted
- crusty
- crystallized
- fossilized
- granulated
- hardened
- hornified
- indurate
- indurated
- lapidified
- ossified
- petrified
- reinforced
- rigidified
- sclerotic
- set
- solidified
- steeled
- stiffened
- strengthened
- toughened
- vitrified