| correction(noun, quality, process, improvement, bettering) |
| development(noun, quality, process, improvement, bettering) |
| elevation(noun, quality, process, improvement, bettering) |
| enhancement(noun, quality, process, improvement, bettering) |
| enrichment(noun, quality, process, improvement, bettering) |
| gain(noun, quality, process, improvement, bettering) |
| improvement(noun, quality, process, bettering) |
| progress(noun, quality, process, improvement, bettering) |
| progression(noun, quality, process, improvement, bettering) |
| promotion(noun, quality, process, improvement, bettering) |
| recovery(noun, quality, process, improvement, bettering) |
| renovation(noun, quality, process, improvement, bettering) |
| repair(noun, quality, process, improvement, bettering) |
| revision(noun, quality, process, improvement, bettering) |
| upgrade(noun, quality, process, improvement, bettering) |
| customer service(noun, expression, system, facility, utility) |