Forbidden Words! Game A card game for learning and revising topic related vocabulary. For ESL and EFL students. Intermediate level. The topic of this particular worksheet is Travel/Holidays. The aim of the game is to explain given words, but without those words that you would most likely use because those are forbidden, students can't use them. Every word has 4 or 5 forbidden words and if it is too difficult to explain the word without using those, you can allow your students to use one or more of the forbidden words.