General synonyms:
* Wealth
* Prosperity
* Abundance
* Opulence
* Richness
* Fortunes
* Success
* Abundance
* Plenty
More specific synonyms:
* Financial affluence: Wealth, riches, financial security
* Material affluence: Opulence, luxury, lavishness
* Social affluence: Prestige, status, influence
* Cultural affluence: Refinement, sophistication, elegance
The best synonym will depend on the context of your writing. For example, if you're talking about a country's economic growth, "prosperity" might be a good choice. If you're describing a person's lifestyle, "opulence" might be more appropriate.