coexistent

adj

1. (not-comparable)existing at the same time as something else

   “Juxtaposed with the reports of war related fatalities, such information cannot but help but allow viewers to reconfirm metaphorical connections between war and AIDS. And give ^([sic]) the coexistent realities of the epidemic and the War Against Iraq, it isn't a great leap to link those two specific realities together.”

noun

1. That which coexists with another.