| probe(noun, study, check, try, test) |
| research(noun, verb, study, check, measure) |
| rigor(noun, trouble, worry, difficulty, sorrow) |
| sample(noun, verb, adjective, try, model) |
| stab(noun, go, energy, crack, informal) |
| striving(noun, performance, action, go, work) |
| stroke(pain, disaster, calamity, upheaval) |
| tournament(noun, event, fight, challenge, struggle) |
| undertaking(noun, performance, study, go, work) |
| unhappiness(noun, trouble, worry, abuse, distress) |
| worry(noun, trouble, concern, blow, strain) |
| action(noun, activity, movement, understanding, knowledge) |
| anxiety(noun, trouble, worry, concern, blow) |
| casualty(noun, trouble, hurt, ruin, defeat) |
| challenge(noun, dispute, question, test, task) |
| claim(noun, action, cause, dispute, reason) |
| complication(noun, trouble, misery, suffering, hardship) |
| crisis(noun, difficulty, situation, disaster, catastrophe) |
| crucible(noun, state, trouble, easy, distress) |
| destitution(noun, trouble, hurt, defeat, fall) |