"Easy going" is a commonly used phrase to describe a laid-back and relaxed personality. However, there are various other synonyms that can also convey the same meaning. Some of these synonyms include carefree, unflappable, mellow, calm, peaceful, and relaxed. These words can be used interchangeably to describe someone who tends to be flexible and doesn't get easily stressed out or anxious. Other synonyms include breezy, nonchalant, affable, and amiable. All of these words can be used to describe someone who is easy to get along with and doesn't let minor problems affect their mood or attitude.