We propose in this paper to use NLP approaches to validate induced syn- tactic relations. We focus on a Web Validation system, a Semantic Vector-based approach, and finally a Combined system. The Semantic Vector approach is a Roget-based approach which computes a syntactic relation as a vector. The Web Validation technique uses a search engine to determine the relevance of a syntactic relation. We,experiment our approaches on real-world data set. The ROC curves are used to evaluate the results.