Pronunciation: [kˈa͡ʊə͡ʊ] (IPA)
Correct spelling for the English word "COUO" is [kˈa͡ʊə͡ʊ], [kˈaʊəʊ], [k_ˈaʊ_əʊ] (IPA phonetic alphabet).
Correct spelling for COUO