A tank locomotive is a type of locomotive that carries its own water and fuel in tanks mounted on the locomotive's frame. If you are searching for synonyms for tank locomotive, there are several terms that you can use. These include a tank engine, a saddle tank locomotive, or a pannier tank locomotive. Additionally, steam tank locomotives differ from diesel or electric locomotives, which are powered by a separate engine, unlike the steam locomotives that use steam power to operate the wheels. Other synonyms for tank locomotive may include steam engines, steam trains, narrow-gauge locomotives, or even vintage locomotives, depending on the context in which they are used.