Arrowhead

Archaeologists use the term  “projectile point” instead of arrowhead.  This is because many of these tools were not used for arrows, but instead were used as other things unrelated to bow-and-arrow technology, such as the tips of spears and knives. When archaeologists find tools that were used as tips for arrows, they use terms such as “arrow point”. [See: http://archaeology.about.com/od/aterms/g/arrowhead.htm for more]