| apathy(noun, feeling, tedium, boredom) |
| attribute(noun, feature, characteristic, trait) |
| boredom(noun, feeling, tedium) |
| characteristic(noun, feature, trait, attribute) |
| creating by removal(expression, creation, production, drill) |
| dissatisfaction(noun, feeling, tedium, boredom) |
| dreariness(noun, feeling, tedium, boredom) |
| drill(noun, creation, production) |
| dullness(noun, feeling, tedium, boredom) |
| ennui(noun, feeling, tedium, boredom) |
| feature(noun, characteristic, trait, attribute) |
| frustration(noun, feeling, tedium, boredom) |
| humdrum(noun, feeling, tedium, boredom) |
| lack of concern(expression, feeling, tedium, boredom) |
| lack of enthusiasm(expression, feeling, tedium, boredom) |
| lack of excitement(expression, feeling, tedium, boredom) |
| lack of interest(expression, feeling, tedium, boredom) |
| lack of variation(expression, feeling, tedium, boredom) |
| lack of variety(expression, feeling, tedium, boredom) |
| mining(noun, creation, production, drill) |