| difficulty(noun, problem, hardship, hardness) |
| attribute(noun, feature, characteristic, trait) |
| characteristic(noun, feature, trait, attribute) |
| complexity(noun, difficulty, problem, hardship, hardness) |
| complication(noun, difficulty, problem, hardship, hardness) |
| feature(noun, characteristic, trait, attribute) |
| hardness(noun, difficulty, problem, hardship) |
| property(noun, feature, characteristic, trait, attribute) |
| quality(noun, feature, characteristic, trait, attribute) |
| trait(noun, feature, characteristic, attribute) |
| complicatedness(noun, difficulty, problem, hardship, hardness) |
| difficultness(noun, difficulty, problem, hardship, hardness) |
| disadvantage(noun, difficulty, problem, hardship, hardness) |
| drawback(noun, difficulty, problem, hardship, hardness) |
| handicap(noun, difficulty, problem, hardship, hardness) |
| hindrance(noun, difficulty, problem, hardship, hardness) |
| hitch(noun, difficulty, problem, hardship, hardness) |
| impediment(noun, difficulty, problem, hardship, hardness) |
| intricacy(noun, difficulty, problem, hardship, hardness) |
| issue(noun, difficulty, problem, hardship, hardness) |