| exert(verb, action, act, effort, labor) |
| fag(verb, action, act, effort, labor) |
| falter(verb, action, act, effort, labor) |
| flog(verb, action, act, effort, labor) |
| flounder(verb, action, act, effort, labor) |
| fumble(verb, action, act, effort, labor) |
| go through |
| hammer(verb, action, act, effort, labor) |
| horse race(noun, expression, conflict, combat, competition) |
| hustle(verb, action, act, effort, labor) |
| innovation |
| labyrinth |
| lurch(verb, action, act, effort, labor) |
| melee(noun, conflict, contest, clash, combat) |
| miss out |
| moil(verb, action, act, effort, labor) |
| muddle(verb, action, act, effort, labor) |
| overexert(verb, action, act, effort, labor) |
| overwork(verb, action, act, effort, labor) |
| pitched battle(noun, expression, conflict, contest, clash) |