Pronunciation: [natˈɒpkə͡ʊ] (IPA)
Correct spelling for the English word "NATOPCO" is [natˈɒpkə͡ʊ], [natˈɒpkəʊ], [n_a_t_ˈɒ_p_k_əʊ] (IPA phonetic alphabet).
Correct spelling for NATOPCO