Correct spelling for the English word "Supportance" is [səpˈɔːtəns], [səpˈɔːtəns], [s_ə_p_ˈɔː_t_ə_n_s] (IPA phonetic alphabet).
"Supportance" is a term that does not have an established, widely-accepted dictionary definition. As such, a standard 200-word dictionary entry for "supportance" does not exist.