There are several synonyms for the word "crosstrainer" which refer to the same type of exercise equipment. Some common synonyms include elliptical machine, elliptical trainer, or simply elliptical. These machines are popular choices for cardio workouts as they provide a low impact workout that is easy on the joints. Other synonyms include step machines, stair climbers, and incline trainers. These machines provide a similar workout to crosstrainers, but with different movements. Ultimately, all of these synonyms refer to machines that simulate natural movements like walking, running, and climbing for an effective cardiovascular workout.