Connections Hint Today Thu, Mar 6 #667

Need help with Connections puzzle #667 on Thu, Mar 6? Get your daily connections hint today! Find the hidden links between these 16 words: DWINDLE, FADE, PETER, TAPER, PLANT, PRUNE, WATER, WEED, FLAT, MARY JANE, MULE, SLIDE, CASTLE, PAPER, PIPER, STONE