The term 'ill-tempered one' can be described by five different words: SHREW (5 letters), CRAB (4 letters), CRANK (5 letters), HELLCAT (7 letters), and Feist (5 letters). A SHREW is a small mammal that is known for its aggressive behavior, while a CRAB is a crustacean that is known for its irritable nature. A CRANK is someone who is easily irritated or bad-tempered, and a HELLCAT is an even more extreme version of a CRANK. Finally, a feist is a small dog that is known for its fiery temper. All of these words describe someone who is ill-tempered or bad-tempered.