ISOLATIONIST

\ˌa͡ɪsəlˈe͡ɪʃənˌɪst], \ˌa‍ɪsəlˈe‍ɪʃənˌɪst], \ˌaɪ_s_ə_l_ˈeɪ_ʃ_ə_n_ˌɪ_s_t]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd