hyperthyreosis

noun
hy·​per·​thy·​re·​o·​sis | \ -ˌthī-rē-ˈō-səs How to pronounce hyperthyreosis (audio) \
variants: also hyperthyrosis \ -​ˈrō-​səs How to pronounce hyperthyrosis (audio) \
plural hyperthyreoses also hyperthyroses\ -​ˌsēz How to pronounce hyperthyroses (audio) \

Medical Definition of hyperthyreosis