concurrent(happening at the same time; simultaneous) adjective [UK: kənˈk.ʌ.rənt] [US: kənˈk.ɜː.rənt]
simultaneous(occurring at the same time) adjective [UK: ˌsɪml.ˈteɪ.nɪəs] [US: ˌsaɪ.məl.ˈteɪ.niəs]He was destined to become a simultaneous interpreter. = Él estaba destinado a convertirse en intérprete simultáneo.