There are several synonyms for the term "Indian Monetary Unit" which refer to the currency used in India. The most common synonym is "Indian Rupee" which is the official currency of India and is used for daily transactions. Another synonym for this term is "INR" which is the ISO code for the Indian Rupee, often used in financial statements and trading. Additionally, the Indian Rupee is sometimes colloquially referred to as "Rupiah," similar to the Indonesian currency of the same name. Overall, these synonyms all refer to the same currency and can be used interchangeably.