kəˈmōrēənt noun
( plural commorients -ts ; or commorien·tes kəˌmōrēˈen.ˌtēz)
Etymology: Latin commorient-, commoriens, present participle of commori to die with, from com- + mori to die — more at murder
: one of two or a number of persons perishing at the same time by the same calamity