Laddie, a term of endearment used to address a young boy or a man, has many synonyms that can be used as an alternative. Some of the common synonyms are lad, chap, fellow, bloke, dude, youngster, boy, and sonny. These words are often used interchangeably with laddie and convey a sense of affection and camaraderie. Other potential synonyms for laddie include junior, teen, juvenile, minor, and tyke, which can be used to refer to a younger boy. Whether you are looking for a more formal or informal way to address a young man, these synonyms can help you find the right word to use.