this study aimed to investigate the effectiveness of morphological awareness training program in developing lexical richness among first-year English majors  at the Faculty of Foreign Languages and Translation, Misr University for Science and Technology in terms of lexical density and variation. Quasi-experimental method was adopted with its pretest-posttest control group design.  A training program on morphological awareness was developed to fulfill the purpose of the study. Sixty students participated in the study; ( 30 ) in the experimental group and (30) in the control group . The results pinpointed the effectiveness of morphological awareness training program in developing lexical richness among EFL majors  in favor of the posttest of lexical density and variation among the experimental group students. The study recommended training teachers on morphological awareness to help their students develop their lexical richness.