Play NYT Connections Puzzle #720 Tue, Apr 22

Find groups of four related words Need hints?

Solve NYT Connections puzzle #720 - Group 16 words into 4 categories: AXE, CUT, DROP, SCRAP, CLAY, GLAZE, KILN, WHEEL, BANANA PEEL, EEL, GREASE, ICE, FIRE, LIGHTNING, SUN, VOLCANO.