ABSTRACT Husnul Hitami, 2014, entitled The Effect Thesaurus Wok Technique to Improve Students’ Vocabulary Mastery at Seventh Grade of MTs. Al MakkiyahKamoning Sampang. Undergraduate, Thesis, Tarbiyah Department, English Teaching Learning Program (TBI), The State of Islamic College (STAIN) Pamekasan. Advisor:Nina Khayatul Virdyna, M.Pd Key Words: Thesaurus Work Technique, Students’ Voca…