The article reveals with the ways , strategies of effective writing academic essays and how to achieve high scores in process of it .It is suggested that one way is to choose proper word or phrase to avoid repetition in essays ,however, can be tough job for a writer. A meaning of the word relates to a variety of the linguistic processes such as polisemy , synonymy , homonymy , styles of the speech .This research aims to discuss substituting proper the kinds of synonyms and the difference between polisemy and homonymy for a writer to success in academic essays .