Measurement of semantic similarity between Web services is an important factor for Web service discovery, composition, and even execution. Semantic Web services (SWS) are usually specified based on ontologies. The measurement of semantic similarity between Web services thus can be reduced to computing semantic distances between ontologies. In this paper, we briefly surveyed three major existing ontology-distance-computation algorithms and enhanced them to measure the single and multiple ontolgies similarity in SWS context. Based on this survey, we summarized a new hybrid ontology-similarity-measurement methodology that measures similarity between Semantic Web Services.