When it comes to indicating that something is permitted or approved, there are several synonyms for the phrase "is authorized." Some of these include "is sanctioned," "is certified," "is approved," "is endorsed," "is licensed," "is permitted," and "is legal." These phrases can be used interchangeably to express the idea that something has been given the go-ahead or the green light for use or action. Whether you're discussing a business operation, a financial transaction, or any other situation where permission or approval is required, these synonyms can add variety and nuance to your language.