Fusileer is a word that has various synonyms. Some of the commonly used alternatives include rifleman, marksman, sharpshooter, shooter, and gunner. Other options would include musketeer, infantryman, soldier, or trooper. Each of these synonyms often overlaps in meaning and context of "fusileer," which is a soldier armed with a musket. These synonyms are frequently used in various contexts, such as military writings, history books, and novels, to describe an individual who is skilled in the use of firearms. The selection of a suitable synonym would depend on a particular context, tone, and usage. Nevertheless, they all describe soldiers, who are adept at using firearms, and thus possessing great physical and mental training.