A foilist is commonly known as a fencer who specializes in foil, a light and flexible sword used for competition and training. While the term "foilist" is specific to the sport of fencing, there are several synonyms that describe a person who practices fencing with expertise and skill. Some alternative words include swordsmen, epeeists, sabreurs, duellists, and blademasters. However, it's essential to note that each of these words corresponds to a specific type of fencing, whether it's using the epee, sabre, or duelling sword. Nonetheless, they all describe individuals who showcase exceptional agility, focus, and endurance when it comes to wielding a sword in a competitive setting.