Naira is the official currency of Nigeria, however, there are several synonyms that exist for this currency. Some of these include NGN (Nigerian Naira), NER (Nigerian Eco), NKN (Nigerian Kobo), and NGN (Nigerian Pound). While these are not commonly used in everyday language, they are often used in financial and business transactions. In some cases, the term "naira" may also be synonymously used to refer to money in general in Nigerian English. Overall, these synonyms provide an alternative way of referring to Nigeria's currency, allowing for smooth and accurate communication in various settings.