The crossword solutions for the term LIKE A MULE are STERILE (7 letters) and STUBBORN (8 letters). A mule is a hybrid animal, created by breeding a male donkey and a female horse. It is known for its strength and endurance, but also for its sterility, meaning it cannot reproduce. Mules are also known for their stubbornness, as they can be difficult to control and train. Therefore, the phrase 'like a mule' is often used to describe someone who is strong-willed and determined.