The phrase "be rich" can take on many synonyms, depending on the context in which it is used. Some synonyms for be rich include "wealthy", "prosperous", "abundant", "affluent", "opulent", "loaded", "well-off", "plentiful", "bountiful" and "prosperous". These synonyms usually imply that an individual has accumulated significant wealth, either through business ventures, inheritance, or investment strategies. However, being rich can also be interpreted in terms of one's general well-being or happiness, which would make synonyms such as "fulfilled", "content", "satisfied", and "happy" more appropriate. Overall, the choice of synonym would depend on the context in which one is using the term.