| bedevil(verb, upset, trouble, bother, disturb) |
| bother(verb, upset, trouble, disturb, worry) |
| canker |
| chaw(verb, cut, eat, grind, bite) |
| fray |
| gnash(verb, attack, seize, grind, bite) |
| grind(verb, bite, friction, chew, munch) |
| gum(verb, eat, grind, bite, nibble) |
| hurt(harm, annoy, spoil, irritate, injure) |
| needle(verb, upset, trouble, bother, disturb) |
| pain(noun, verb, trouble, bother, worry) |
| pierce(verb, cut, eat, snap, physical pain) |
| snap(verb, food, cut, bother, annoy) |
| sting(noun, annoy, irritate, needle, nettle) |
| torture(verb, trouble, provoke, pursue, frustrate) |
| vex(verb, upset, trouble, bother, disturb) |
| worry(verb, upset, trouble, bother, disturb) |
| abrade(verb, upset, trouble, bother, disturb) |
| agonize |
| beleaguer(verb, upset, trouble, bother, disturb) |