1. (noun) a change for the better; progress in development

• advance
• betterment

2. (noun) a condition superior to an earlier condition

• melioration

1. (noun) a change for the better; progress in development

• accommodation
• adjustment
• fitting
• conservation
• preservation
• elaboration
• refinement
• recovery
• resurgence
• revitalisation
• revitalization
• revival
• revivification

2. (noun) the act of improving something

• airing
• ventilation
• amelioration
• betterment
• melioration
• clarification
• clearing
• cleaning
• cleansing
• cleanup
• correction
• rectification
• development
• enhancement
• sweetening
• enrichment
• fix
• fixing
• fixture
• mend
• mending
• repair
• reparation
• humanisation
• humanization
• modernisation
• modernization
• optimisation
• optimization
• overhaul
• redevelopment
• renovation
• perfection
• reform
• self-improvement
• self-reformation
• stabilisation
• stabilization
• tenderisation
• tenderization
• upgrade
• upturn

3. (noun) a condition superior to an earlier condition

• betterment
• development
• reformation
• refurbishment
• renovation
• restoration

1. (noun) a change for the better; progress in development

• shift
• transformation
• transmutation

2. (noun) the act of improving something

• change of state

3. (noun) a condition superior to an earlier condition

• condition
• status

1. (noun) a change for the better; progress in development

• advance
• come along
• come on
• get along
• get on
• progress
• shape up
• advance
• boost
• encourage
• further
• promote
• ameliorate
• ameliorate
• better
• better
• improve
• improve
• meliorate
• meliorate

2. (noun) the act of improving something

• ameliorate
• amend
• better
• improve
• meliorate

3. (noun) a condition superior to an earlier condition

• ameliorate
• ameliorate
• better
• better
• improve
• improve
• meliorate
• meliorate
• ameliorate
• amend
• better
• improve
• meliorate

1. (noun) a condition superior to an earlier condition

• declination
• decline