| obligation(noun, trouble, force, strain, difficulty) |
| persuasion(noun, trouble, force, strain, difficulty) |
| physical force(noun, expression, burden, weight, gravity) |
| press(noun, trouble, force, strain, difficulty) |
| pull(noun, trouble, force, strain, difficulty) |
| requirement(noun, trouble, force, strain, difficulty) |
| shear(noun, burden, weight, gravity, heaviness) |
| squeeze(noun, burden, weight, gravity, heaviness) |
| squeezing(noun, burden, weight, gravity, heaviness) |
| strain(noun, trouble, force, difficulty, burden) |
| strength(noun, burden, weight, gravity, heaviness) |
| sway(noun, trouble, force, strain, difficulty) |
| tension(noun, trouble, force, strain, difficulty) |
| thrust(noun, burden, weight, gravity, heaviness) |
| trouble(noun, force, strain, difficulty, burden) |
| unnaturalness(noun, trouble, force, strain, difficulty) |
| urgency(noun, trouble, force, strain, difficulty) |
| weight(noun, trouble, force, strain, difficulty) |