CERTIFICATORY

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