Play NYT Connections Puzzle #676 Thu, Mar 13

Find groups of four related words Need hints?

Solve NYT Connections puzzle #676 - Group 16 words into 4 categories: ANGLE, BIAS, SLANT, SPIN, FLAG, HAIL, WAVE, WHISTLE, FLOP, HOLE, RIVER, TURN, ANON, ART, THOU, WILT.