Play NYT Connections Puzzle #323 Tue, Apr 16

Find groups of four related words Need hints?

Solve NYT Connections puzzle #323 - Group 16 words into 4 categories: FLOOR, ROCK, SHOCK, SURPRISE, ARTICLE, FEATURE, REPORT, STORY, EVEN, FLAT, FLUSH, LEVEL, BALCONY, BOX, ORCHESTRA, STAGE.