Pronunciation: [ˈɒnəbˌə͡ʊ] (IPA)
Correct spelling for the English word "ONRBO" is [ˈɒnəbˌə͡ʊ], [ˈɒnəbˌəʊ], [ˈɒ_n_ə_b_ˌəʊ] (IPA phonetic alphabet).
Correct spelling for ONRBO