Trudgen is a swimming term that refers to a specific freestyle stroke in which a swimmer alternately performs a flutter kick and a windmill-like motion with their arms over the water. Synonyms for trudgen could include the "overarm sidestroke" or "overarm swimming," as both terms describe the same technique used in trudging. Other synonyms for trudging might include "crawl stroke" or "front crawl," which also involves a flutter kick and windmill arm motions. Another possible synonym is the "Australian crawl," which is a variation of the front crawl that was popularized in Australia during the early 20th century.