remorseless (adj.)
- bowelless
- callous
- cruel
- flinty
- hard
- harsh
- heartless
- impenitent
- implacable
- inclement
- inexorable
- merciless
- pitiless
- relentless
- ruthless
- savage
- shameless
- unashamed
- uncompassionate
- unfeeling
- unforgiving
- unmerciful
- unpitying
- unregretful
- unregretting
- unrelenting
- unremitting
- unremorseful
- unrepentant
- unstoppable
- unsympathetic
- unsympathizing
- unyielding
