indurated (?.)
- Philistine
- backed
- brazen
- calcified
- callous
- calloused
- case-hardened
- conscienceless
- crusted
- crusty
- crystallized
- flinty
- fossilized
- granulated
- hard
- hardened
- hardhearted
- heartless
- hornified
- impervious
- incrusted
- indurate
- insensitive
- inured
- lapidified
- lost to shame
- obdurate
- ossified
- pachydermatous
- petrified
- proof against
- reinforced
- rigidified
- sclerotic
- seared
- set
- shameless
- solidified
- steeled
- steeled against
- steely
- stiffened
- stony
- strengthened
- thick-skinned
- toughened
- unblushing
- vitrified
