Pronunciation: [ˈɛnpɹˈɒpsə͡l] (IPA)
Correct spelling for the English word "NPROPSAL" is [ˈɛnpɹˈɒpsə͡l], [ˈɛnpɹˈɒpsəl], [ˈɛ_n_p_ɹ_ˈɒ_p_s_əl] (IPA phonetic alphabet).
Correct spelling for NPROPSAL