"On easy street" is an idiom commonly used to describe a comfortable and affluent lifestyle. However, there are a number of synonyms that can be used to convey a similar meaning. One such term is "living the high life," which suggests a luxurious and extravagant way of living. Another option is "rolling in dough," which implies financial abundance and prosperity. "Living in clover" is another good option, as it suggests a life of comfort and ease. Finally, "sitting pretty" is another great synonym for "on easy street," as it suggests that the individual in question is in a highly favorable position and has nothing to worry about.