General:
* Growth: This is a very common synonym, often used for physical growth, but can also apply to the growth of ideas or skills.
* Progress: This emphasizes movement forward and improvement.
* Advancement: Similar to progress, but often used in a more formal context.
* Evolution: This implies a gradual process of change, particularly in the context of ideas or systems.
* Maturation: This implies a process of becoming more complete or complex.
* Expansion: This implies an increase in size or scope.
* Improvement: This implies a positive change that makes something better.
* Enhancement: Similar to improvement, but with a focus on adding value or making something more attractive.
Specific to certain fields:
Software:
* Implementation: Putting a plan or design into action.
* Construction: Building or creating a new software product.
* Deployment: Making a software product available for use.
Economics:
* Expansion: Growing the economy or a specific sector.
* Industrialization: The process of developing industries.
* Modernization: Making a country or industry more up-to-date.
Personal:
* Self-improvement: Working on personal growth and development.
* Learning: Acquiring new knowledge or skills.
* Maturity: Reaching a state of greater understanding or wisdom.
The best synonym for "development" will depend on the specific context in which it is being used.