adjective
concurrent
kun-KUR-ent/kənˈkɜːrənt/
Existing or operating at the same time.
Two concurrent batches simmer in separate pots on the stove.

Etymology
Literally 'running together,' concurrent applies that image to things proceeding alongside one another in time. They need not agree or cooperate; the selected sense concerns their simultaneous occurrence.
In context
ALEX GARLAND: What Natalie has as an actor is she's got these two concurrent things going on at the same time.
More examples
- The conference offers concurrent sessions, so we must choose one.
- She serves concurrent sentences for the two offenses.
- The server handles hundreds of concurrent requests.
Forms
concurrently adverb — At the same time as something else.
concurrency noun — The state of happening at the same time.
Similar words
- simultaneous
- Often stresses identical timing rather than simply overlapping periods.
- contemporaneous
- Usually places events within the same period, especially historically.