If you're looking for synonyms for the term "most tomboyish", you may consider phrases like "most boyish", "most masculine", "most rough-and-tumble", or "most athletic". Other options could include "most un-girly", "most tomboy-esque", or "most non-conformist". Ultimately, the choice of synonym may depend on the context in which it's being used, as well as the audience's familiarity with the term "tomboyish". Whether you're writing a character description, discussing gender identity, or simply trying to describe someone's personal style, the right synonym can help you convey your meaning with clarity and precision.