Solutions Progressively worsening has 4 entries with similar clues

• 5-letter words
• taperGet progressively narrower and slender (rhymes with "caper")
• 8-letter words
• die-downBecome progressively weaker
• 13-letter words
• dutch-auctionAuction in which the price is progressively lowered until a buyer accepts
• 14-letter words
• vicious-circleWorsening situation of cause and effect