SPONTANEOUS COMBUSTION

\spɒntˈe͡ɪni͡əs kəmbˈʌst͡ʃən], \spɒntˈe‍ɪni‍əs kəmbˈʌst‍ʃən], \s_p_ɒ_n_t_ˈeɪ_n_iə_s k_ə_m_b_ˈʌ_s_tʃ_ə_n]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd