Pronunciation: [ɒbsˈɛʃənə͡li] (IPA)
Correct spelling for the English word "obsessionally" is [ɒbsˈɛʃənə͡li], [ɒbsˈɛʃənəli], [ɒ_b_s_ˈɛ_ʃ_ə_n_əl_i] (IPA phonetic alphabet).
Correct spelling for obsessionally