Pronunciation: [fˈɔːθʃə͡ʊ] (IPA)
Correct spelling for the English word "forthshow" is [fˈɔːθʃə͡ʊ], [fˈɔːθʃəʊ], [f_ˈɔː_θ_ʃ_əʊ] (IPA phonetic alphabet).