Pronunciation: [hˈɛptə͡ʊɪk] (IPA)
Correct spelling for the English word "Heptoic" is [hˈɛptə͡ʊɪk], [hˈɛptəʊɪk], [h_ˈɛ_p_t_əʊ_ɪ_k] (IPA phonetic alphabet).
Correct spelling for Heptoic