The word "four-lobed" refers to something that has four distinct lobes or sections. There are a few different synonyms that can be used to describe something with this characteristic. For instance, the term "quadrilobate" is similar in meaning and can be used to describe a four-lobed structure. Another possible synonym is "tetralobed," which is derived from the Greek word for "four." "Quadrangular" is a term that could also be used, as it describes a shape with four angles, which can translate to having four lobes in some cases. Overall, there are several different options when it comes to finding synonyms for the word "four-lobed".