| grain of salt(expression, idiom, control, check, limit) |
| gridlock(noun, difficulty, obstacle, obstruction, impediment) |
| handicap(noun, control, check, difficulty, limit) |
| hang-up(noun, control, difficulty, limit, condition) |
| hemipteron |
| hiccup |
| holdup(delay, difficulty, problem, disadvantage, bug) |
| hole(noun, difficulty, weakness, crack, fault) |
| impedance(noun, difficulty, obstacle, obstruction, impediment) |
| impediment(noun, difficulty, problem, bug, obstacle) |
| imperfect(adjective, weak, poor, insufficient, scarce) |
| impotent(weak, poor, insufficient, scarce) |
| inadequacy(noun, weakness, lack, failing, flaw) |
| inappreciable(weak, poor, insufficient, scarce) |
| inapt(weak, poor, insufficient, scarce) |
| incapable(weak, poor, insufficient, scarce) |
| incommensurate(weak, poor, insufficient, scarce) |
| incomplete(adjective, poor, insufficient, scarce) |
| inconsiderable(weak, poor, insufficient, scarce) |
| infirmity(noun, weakness, crack, fault, failing) |