Language is rich only with word bank that has ever-growing words. Vocabulary is the growing understanding of words and their meanings. The language and its vocabulary thus enrich a person who is using it. English learners and competitive test takers can enrich themselves in English language and vocabulary with CAT Vocabulary builders. The free application is a good help for them who are looking to score well in competitive examinations that are GMAT, IELTS, GRE, and CAT.