COMBINATORIAL

\kˌɒmbɪnɐtˈɔːɹɪəl], \kˌɒmbɪnɐtˈɔːɹɪəl], \k_ˌɒ_m_b_ɪ_n_ɐ_t_ˈɔː_ɹ_ɪ__ə_l]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd