Funnel-chested is a term used to describe a deformity where the chest appears sunken in at the sternum. However, there are other synonyms that can be used to describe this condition. For instance, pectus excavatum is another term that describes the sunken chest appearance. Another synonym is "concave chest," which is a more general term used to describe any form of chest deformation that causes a depression in the chest. Additionally, some people use "hollow chest" to describe such deformities. Understanding these synonyms can help people with funnel-chested deformities better communicate their condition with others. It can also help medical professionals diagnose and treat the condition accordingly.