When an account is terminated, it means it has been closed or ended. There are several synonyms for this phrase that convey the same idea. For example, you can use the term "closed account" to describe an account that is no longer active or functional. Another relevant synonym is "deactivated account," which implies the account was turned off or disabled. A "cancelled account" is another word that can be used interchangeably with terminated account. Lastly, you can use the phrase "shut down account" to explain the ending of an account. Whatever the synonym used, the bottom line is that the account is no longer in use.