We investigate Chinese near-synonyms (include synonyms and near-synonyms) based on complex network theory. In the study of near-synonyms network, scale-free effect and hierarchical structure features are found in this complex system. In particular, we find that n-node cliques exist widely in near-synonyms network. N-node clique structure is a powerful tool for understanding global structures of complex networks. Through the analysis of nnode cliques, near-synonyms are clustered in clique style. The structures properties of n-node cliques in a way may explain the associative mechanism and information storage in human brain.
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