The term "round shield" is a common phrase to describe a type of shield used by ancient warriors. However, there are several other words that can be used as synonyms for this term. For instance, a round shield can also be called a buckler. It can also be referred to as a targe, which is a type of small shield typically used by the Scottish Highlanders. Another synonym for "round shield" is a scutum, which was a type of shield used by Roman soldiers. There are also regional variations, such as the aspis used by Greek hoplites or the parma used by ancient Etruscans.