Correct spelling for the English word "goatchafer" is [ɡˈə͡ʊt͡ʃe͡ɪfə], [ɡˈəʊtʃeɪfə], [ɡ_ˈəʊ_tʃ_eɪ_f_ə] (IPA phonetic alphabet).
A kind of beetle.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.