I don't have enough space in my classroom for a Word Wall, since I share with music. This always bummed me out, but I just found this as an alternative!!! Since our PTC was so generous to give me a SMARTboard, why not make a Vocab Word Cloud and display it during down time on the SMARTboard?
http://www.abcya.com/! It's super easy to use and you can save your words in a word document and just add to it as you go. Then, copy and paste into the text field on the website and "TA-DA!", your word cloud is created. Click save to download it to your computer.