Pronunciation: [nˌɒnt͡ʃˈalɪnd͡ʒə] (IPA)
Correct spelling for the English word "nonchallenger" is [nˌɒnt͡ʃˈalɪnd͡ʒə], [nˌɒntʃˈalɪndʒə], [n_ˌɒ_n_tʃ_ˈa_l_ɪ_n_dʒ_ə] (IPA phonetic alphabet).