This article provides an in-depth comparison and proposal for mapping between Simple Knowledge Organization System (SKOS) and TermBase eXchange (TBX), two important exchange standards within the knowledge and terminology landscape. The attempt to develop an interface or conversion routine between SKOS and TBX is rooted in a strong demand in the language and knowledge industries for resource leverage and based on the premise that the two formalisms are governed by similar data models, namely the description of concepts (rather than words).