Space
CRATER
A crater is a bowl-shaped depression formed by the impact of a meteorite or by volcanic activity. The Moon's surface is covered in impact craters preserved by the lack of erosion. The word derives from the Greek 'krater', a large vessel used for mixing wine.
CRATER is the kind of word that shows up in themed word searches like Strands. Themed puzzles group words like this under a shared category — here, Space.