There are various synonyms for the phrase "make it tough." One of them is "make it difficult," which implies that something is challenging to achieve or accomplish. Another synonym is "make it hard," which suggests that the task requires significant effort and exertion to complete successfully. "Make it challenging" is another synonym, which connotes that the task or situation involves obstacles that may render it challenging. Other synonyms that are similar in meaning to "make it tough" include "make it formidable," "make it strenuous," and "make it arduous." Using these synonyms can enhance the language you use and convey a more specific meaning.