A boilermaker is a skilled worker who fabricates and assembles metal structures. This word can have different meanings in various contexts. In the context of a cocktail, a boilermaker is a shot of whiskey that is served with a beer. Synonyms for the word boilermaker could be metalworker, welder, fabricator, pipefitter, or machinist depending on the specific job description. In some cases, the word boilermaker could also refer to a type of heavy machinery used in industries such as mining or construction. In short, boilermaker is a versatile term that can have different meanings, and its synonyms vary depending on how the word is used.