The phrase "most locomotive" can be expressed in various ways using synonyms. Some of these synonyms include "most powerful," "most energetic," "most active," "most mobile," "most propulsive," "most driven," and "most vibrant." These words can be used to describe a machine, a person, or a movement that is highly dexterous and has the ability to move quickly and efficiently. The term can also refer to an enterprise or an undertaking that carries a lot of energy and drive. Therefore, depending on the context, there are countless synonyms to describe the phrase "most locomotive" that can capture its meaning accurately.