4. The method as claimed in claim 1 , wherein the discovering the one or more homonyms synonyms of the at least a monitored vocabulary set is through the previous and the next feature windows of each monitored vocabulary of said at least a monitored vocabulary set to capture at least one feature, to determine whether one or more new words of the plurality of new added data belong to at least one homonym synonym of said monitored vocabulary.
5. The method as claimed in claim 4 , wherein said at least one feature is one or more features chosen from a group of features consisting of a keyword pattern, a part of speech pattern, a concept pattern, and a word string similarity.