Pronunciation: [ɡɹˈiːnə͡ʊ] (IPA)
Correct spelling for the English word "greeno" is [ɡɹˈiːnə͡ʊ], [ɡɹˈiːnəʊ], [ɡ_ɹ_ˈiː_n_əʊ] (IPA phonetic alphabet).