| cheerlessness(noun, weariness) |
| dissatisfaction(noun, melancholy, apathy, languor, boredom) |
| fatigue(noun, melancholy, dullness, apathy, indifference) |
| humdrum(noun, adjective, routine, dullness, monotony) |
| insipidity(noun, routine, dullness, slowness, feebleness) |
| invariability(noun, routine, dullness, monotony, flatness) |
| languor(noun, melancholy, apathy, fatigue, pensiveness) |
| listlessness(noun, depression, melancholy, gloom, dullness) |
| melancholy(noun, sorrow, depression, sadness, unhappiness) |
| uniformity(noun, routine, dullness, likeness, similarity) |
| very long work |
| changelessness |
| exhaustion(noun, fatigue, weariness, tiredness) |
| feebleness(noun, dullness, weariness, blandness) |
| indifference(noun, depression, melancholy, gloom, dullness) |
| insipidness(noun, routine, dullness, slowness, feebleness) |
| irksomeness(noun, melancholy, dullness, apathy, indifference) |
| lifelessness(noun, routine, dullness, slowness, feebleness) |
| monotone(noun, routine, dullness, monotony, flatness) |
| repetitiousness(noun, routine, dullness, monotony, flatness) |