after part; arse; ass; austere; backside; behind; bottom; bum; buns; butt; buttocks; can; derriere; exacting; fanny; fundament; grim; hind end; hindquarters; inexorable; isaac stern; keister; nates; poop; posterior; prat; quarter; rear; rear end; relentless; rump; seat; severe; stark; strict; tail; tail end; tooshie; tush; unappeasable; unforgiving; unrelenting;