Nakfa is the currency of Eritrea, and it may not have many synonyms due to its specificity. However, in the broader context of money, there are many synonyms available. The most common ones are cash, currency, money, and funds. Some other synonyms that may be relevant include banknotes, change, coins, and legal tender. Additionally, colloquial or slang terms like dough, moolah, or bucks can be used to refer to money in general. It's essential to note that while these synonyms may be interchangeable, it's crucial to use them contextually to convey the intended meaning accurately.