There is no doubt that ways to memorize English vocabulary have been being a critical key to have a good command of English. In accordance with of the results of the study, the four methods discussed have their own strengths and weaknesses. Among these methods, “Compound word” is, as a result of the survey, the most preferable for the students in our school because of its advantage that it helps one not only learn the words easily and firmly but also enlarge vocabulary. Moreover, the teachers in our school regarded “Prefixes, word roots and suffixes“ as the most preferable way to teach in the class. Based on the study, we expect it to provide English learners with best ways to expand English vocabulary so that they can successfully acquire the foreign language.