EMPTY WORDS

\ˈɛmpti wˈɜːdz], \ˈɛmpti wˈɜːdz], \ˈɛ_m_p_t_i w_ˈɜː_d_z]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd