Synonyms are words that have similar meanings to another word. When it comes to the phrase "heel edge", there are a few alternatives that can be used interchangeably. For instance, "back edge" can be used to convey the same meaning as it refers to the rear side or end of something. Similarly, "rear edge" emphasises the back portion of an object. Another synonym for "heel edge" is "posterior edge", which conveys the idea of the back surface or boundary of an item. Overall, these synonyms offer alternatives to the term "heel edge" while maintaining the same underlying concept.