CONSERVATIONIST

\kˌɒnsəvˈe͡ɪʃənˌɪst], \kˌɒnsəvˈe‍ɪʃənˌɪst], \k_ˌɒ_n_s_ə_v_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