I was sitting in a wonderful on campus training designed for the core teachers on interactive words and I realized my whole room is basically a interactive word wall and yours probably is too. In my district, students take a standardized art test in the fall and spring. The students test scores are tied to my pay, so I had to come up with ways to have information available all year long.
I have all the vocabulary words used through the year posted with a picture, so they can see what the word means.
Poster may be plain, their simplicity actual helps the students to access the information.
You do need have students interact with word wall. I usually pose questions about art work and students look around the room to find the academic vocabulary they need to answer the question.