| active(busy, occupied, running, working, engaged) |
| at it(expression, active, busy, occupied, working) |
| at work(expression, active, busy, occupied, working) |
| employed(active, busy, occupied, running, working) |
| engaged(active, busy, occupied, running, working) |
| hired(active, busy, occupied, working, engaged) |
| hot(active, occupied, running, functioning, operational) |
| in collar(expression, active, busy, occupied, working) |
| in force(expression, running, functioning, operational) |
| in full swing(expression, active, occupied, running, functioning) |
| in gear(expression, active, occupied, running, working) |
| in harness(expression, active, busy, occupied, working) |
| in place(expression, active, busy, occupied, working) |
| in process(expression, active, occupied, running, functioning) |
| inked(active, busy, occupied, working, engaged) |
| laboring(active, busy, occupied, running, working) |
| occupied(active, busy, running, working, engaged) |
| on board(expression, active, busy, occupied, working) |
| on duty(expression, adjective, active, busy, occupied) |
| on fire(expression, active, occupied, running, functioning) |