The term 'Bull or Rooster' is a reference to the two MALE animals that are commonly used as symbols of strength and power. The crossword solutions for this term are MALE, which is a four-letter word. MALE is a gender designation that is typically used to refer to a person or animal that has certain biological characteristics, such as the presence of testes and the production of sperm. MALE animals are often seen as symbols of strength and power, which is why the term 'Bull or Rooster' was used in this crossword puzzle.