The word "school friend" is often used to describe a friend made during one's school years. However, there are many synonyms that can be used to convey the same meaning. Some include "classmate," "cohort," "schoolmate," "peer," and "acquaintance." In addition, the term "childhood friend" can also be used to describe a friend made during one's school years, emphasizing the early age at which the friendship was formed. It is important to remember that the synonym used can depend on the context and tone of the conversation, but all of these words can be used to describe someone who was a companion during one's school days.