Pronunciation: [ɹˈɪbhəs] (IPA)
Correct spelling for the English word "rhibhus" is [ɹˈɪbhəs], [ɹˈɪbhəs], [ɹ_ˈɪ_b_h_ə_s] (IPA phonetic alphabet).
Correct spelling for rhibhus