1. “For example” and “such as” mean the same thing. But they are generally used in different places in a sentence. For example, “For example” can be used at the beginning of a sentence — as in this sentence. “Such as” would never be used to start a sentence. 2. “Good grade” is generally limited to how well a person does on a test or in a class. “High score” can be used in other contexts, like in sports. 3. Reply to and respond to mean the same. 4. In America, “university” is generally limited to an education institution that confers advanced degrees, like Ph.D degrees. “College” generally refers to an institution that confers only undergraduate degrees (e.g., Bachelor of Arts or Bachelor of Science).