At the same time
It was simultaneously frightening and annoying.
He wore headphones and spoke into a microphone, simultaneously responding to half a dozen chat windows open on this computer.
The cool night hit his skin simultaneously with the warning he least wanted to sense.
Expropriation is an act that simultaneously violates two of the three ingredients for prosperity that I have enumerated: private property and rule of law.
The attacks on the coast occurred simultaneously with nukes that would've been impossible to hide, let alone smuggle into the country.