The goal of this study is to investigate the influence of words categories on translating postgraduate students abstracts doing their M.A in Evaluation and Measurement at Mutah university in Jordan for the academic year 2014/2015. This qualitative and quantitative study includes 15 postgraduate students' abstracts in the field of Evaluation Measurement. The sample of the study was selected randomly. The researcher used two research instruments; textual analysis and interviews. The findings of this research indicated those words' categories play a significant role in achieving the correct meaning and selecting an appropriate translation equivalent. This study recommends that enough attention should be provided by translators when translating words' categories in postgraduate abstracts especially in areas such as evaluation and measurement. Also, this study recommends that further future research be conducted in this area to overcome problems in English as a foreign translation, particularly in contexts such as Jordan.