simultaneous (adjective) simultaneous: happening at about the same time
Sinonime: accompanying, agreeing, at the same time, coetaneous, coeval, coexistent, coexisting, coincident, coinciding,
concurrent, concurring, contemporaneous,
contemporary, dead heat, in sync, synchronal, synchronic, synchronous, with the beat
Antonime: asynchronous,
different,
divided,
following,
preceding,
separate