The phrase "in dues" refers to an amount of money that is owed to a person or organization as a regular payment. Synonyms for this phrase may include "monthly payments," "regular fees," "installments," or "subscriptions." Additionally, the word "dues" can be interchanged with "membership fees" or "association fees" when discussing payments made within a specific organization. It may also be referred to as "contributions" or "donations" when money is voluntarily given. Overall, there are a variety of words that can be used interchangeably with "in dues" depending on the context and nature of the payment.