Four letter Words starting with Z. Zoom, zips, zizz, and zaps! What wonderful words to introduce into your Scrabble and Words with Friends vocabulary! Words containing four letters starting with Z can be a real treat and a great way of getting ahead of your competitors! Make sure you check out our guide to Words starting with Z with four letters; Four letter Words starting with Z, and get ahead of the competition. Check these useful lists too; Seven letter words and Nine letter words!