shakedown

As nouns the difference between mattress and shakedown

is that mattress is a pad on which a person can recline and sleep, usually having an inner section of coiled springs covered with foam or other cushioning material then enclosed with cloth fabric while shakedown is (slang) extortion, especially through blackmail.

As an adjective shakedown is

that tests the performance of a ship or aircraft.

As nouns the difference between extortion and shakedown

is that extortion is the practice of extorting money or other property by the use of force or threats while shakedown is (slang) extortion, especially through blackmail.

As an adjective shakedown is

that tests the performance of a ship or aircraft.

As a proper noun daddy

is one's father.

As a noun shakedown is

(slang) extortion, especially through blackmail.

As an adjective shakedown is

that tests the performance of a ship or aircraft.