Pronunciation: [ɹˌɪvɪˈe͡ɪʃən] (IPA)
Correct spelling for the English word "riviation" is [ɹˌɪvɪˈe͡ɪʃən], [ɹˌɪvɪˈeɪʃən], [ɹ_ˌɪ_v_ɪ__ˈeɪ_ʃ_ə_n] (IPA phonetic alphabet).
Correct spelling for riviation