resignation letter /ɹɪzɪɡnˈeɪʃən lˈɛɾɚ/ /ɹɪzɪɡnˈeɪʃən lˈɛtə/
letter of resignation /lˈɛɾɚɹ ʌv ɹɪzɪɡnˈeɪʃən/ /lˈɛtəɹ ɒv ɹɪzɪɡnˈeɪʃən/
resignation /ˌrezɪɡˈneɪʃn/ /ˌrezɪɡˈneɪʃn/