Codlin is a word commonly used to describe a particular type of apple that's typically sour in taste and used primarily for cooking purposes. However, there are various other words that can be used as synonyms for the term codlin. Some of the most common synonyms for codlin include cooking apples, tart apples, acidic apples, sour apples, and culinary apples. These words all convey the same meanings as codlin and can be used interchangeably in most contexts. Whether you're describing a recipe or discussing the taste of a fruit, these synonyms can help add variation and diversity to your writing.