Cape Kafferboom is a unique name that may be difficult to substitute with synonyms. However, depending on the context, one might use the term "cape" to refer to a headland or promontory jutting out into the sea. For the "Kafferboom" element, one might try using "wild fig tree," which is a related species to the Kafferboom and grows in South Africa. Additionally, the term "Kaffrarian" refers to the region of South Africa where Cape Kafferboom is located and can be used to describe that specific area. Finally, one could use "South African cape" to reference a geographical location with similar characteristics.