Crossword puzzle clue "concave's opposite"

having an outline or surface curved like the exterior of a circle or sphere

a valley

DENT, to make a depression in

DISH, to put into a concave vessel

(French) a sword similar to the foil but with a larger guard and a heavier blade of triangular cross section

a plastic disk several inches in diameter sailed between players by a flip of the wrist

HOLLOW, to remove the interior