There are a number of synonyms for the term "light infantryman," which typically refers to a soldier who is trained to operate in a wide variety of terrain and conditions, and who is often equipped with lighter weapons and gear than other infantry units. Some possible alternatives to "light infantryman" might include terms such as "ranger," "scout," "skirmisher," "reconnaissance trooper," or "elite infantryman." These various terms can reflect different specializations or roles within the broader category of light infantry, and may be used in different contexts or by different military organizations. Ultimately, the specific choice of synonym will depend on factors such as the desired level of detail, the intended audience, and the overall tone or style of the text.