Induration

n.	1.
	1.	The act of hardening, or the process of growing hard.
	2.	State of being indurated, or of having become hard.
	3.	Hardness of character, manner, sensibility, etc.; obduracy; stiffness; lack of pliancy or feeling. A certain induration of character had arisen from long habits of business. - Coleridge.

Noun

1.

induration - any pathological hardening or thickening of tissue Synonyms: sclerosis

Philistinism, armor, callosity, callousness, callus, flintiness, formidable defenses, hard heart, hard shell, hardenedness, hardheartedness, hardness, hardness of heart, heart of stone, imperviousness, insensitiveness, insensitivity, inuredness, obduracy, obdurateness, rhinoceros hide, stoniness, thick skin