The crossword solution for the term 'room theme' is 'DECOR'. DECOR is a term used to describe the style and atmosphere of a room. It includes elements such as furniture, wall art, lighting, and other decorative items that are used to create a certain look or feel. DECOR can be used to create a specific mood or to reflect a particular style. It is an important part of interior design and can be used to make a room more inviting and comfortable.