CO-OPT

\kˈə͡ʊˈɒpt], \kˈə‍ʊˈɒpt], \k_ˈəʊ_ˈɒ_p_t]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd
 
1908 - Chambers's Twentieth Century Dictionary of the English Language
By Thomas Davidson