Dieselpunk, a subgenre of science fiction, typically refers to works set in an alternate history of the 20th century, where technology and aesthetics resemble those of the diesel world. However, if you are tired of using the same term repeatedly, there are synonyms that can be whimsical and entertaining, such as retro-futurism, steamgoth, cogpunk, or atompunk. Each of them emphasizes different elements of the subgenre, such as the vintage feel of retro-futurism, industrial and Gothic themes of steamgoth, cogs and gears of cogpunk, or nuclear futurism of atompunk. In any case, these synonyms can enhance your writing and make it more imaginative and engaging.