| fatigue(noun, melancholy, dullness, apathy, indifference) |
| flavorlessness(noun, routine, dullness, slowness, mildness) |
| humdrum(noun, routine, dullness, tedium, monotony) |
| identicalness(noun, routine, dullness, tedium, monotony) |
| incuriosity(noun, melancholy, dullness, apathy, indifference) |
| inquietude |
| invariability(noun, routine, dullness, tedium, monotony) |
| jadedness(noun, melancholy, dullness, apathy, indifference) |
| jejuneness(noun, routine, dullness, slowness, feebleness) |
| joylessness |
| lack of interest(noun, expression, idiom, melancholy, dullness) |
| lackluster |
| lassitude(noun, melancholy, dullness, apathy, indifference) |
| lethargy(noun, melancholy, dullness, apathy, indifference) |
| levelness(noun, routine, dullness, tedium, monotony) |
| likeness(noun, routine, dullness, tedium, monotony) |
| listlessness(noun, melancholy, dullness, apathy, indifference) |
| malaise |
| modesty |
| monotomy(noun, routine, dullness, slowness, tedium) |