Wiktionary
ballcaps
n. (plural of ballcap English)
Usage examples of "ballcaps".
Both wore ballcaps to protect them from what still felt like a summer sun.
The ship names were on the Navy register, and the sailors of those ships wore ballcaps identifying them by name and hull number.
Stopping along the way at a tourist-vacuum to load myself down further with two coffees, an apple juice, film, postcards, a NASA sunhat for Erin, NASA ballcaps for myself and Zoey, and three pairs of sunglasses.