There are some scholars mentioning the importance of learning vocabulary as following Allen and Vallette mentioned the importance of vocabulary that knowing meanings of vocabulary can build students’ confidence for using communication in various situations. If students do not know vocabulary, they will probably face lots of difficulties in communicating and learning English. As Thornbury(2002) mentioned that if students do not know about English grammar, students could possibly be able to slightly communicate .On the other hand, if the students do not have vocabulary knowledge, they will not be able to communicate.