1) Callousness 2) Coldheartedness 3) Cruelty 4) Hardheartedness 5) Mercilessness 6) Nastiness 7) Pitilessness 8) Unkindness 1) Coldheartedness 2) Coldness 3) Cruelty 4) Hardheartedness 5) Insensitivity 6) Lack of sympathy 7) Pitilessness 8) Unconcern 
[n] - an absence of concern for the welfare of others
coldheartedness noun an absence of concern for the welfare of others