The term 'Creature of Habit' can be represented by two crossword solutions, NUN (3 letters) and NUNS (4 letters). A NUN is a woman who has taken religious vows and is a member of a religious order. Nuns typically live in a convent or monastery and follow a strict daily routine. The term 'Creature of Habit' is often used to describe someone who follows a strict routine and rarely deviates from it. Therefore, the crossword solutions of NUN and NUNS are appropriate for this term as they represent someone who follows a strict routine.