| functional(adjective, practical, running, working, operative) |
| operative(adjective, active, practical, effective, running) |
| operating(adjective, active, practical, working, operative) |
| active(adjective, running, working, operative, functioning) |
| in operation(expression, adjective, idiom, active, effective) |
| operable |
| usable(adjective, functional) |
| working(adjective, practical, running, unaffected, operative) |
| functioning(adjective, active, practical, effective, running) |
| effective(adjective, active, running, working, operative) |
| going(adjective, running, working, happening, operative) |
| in working order(expression, adjective, idiom, functional) |
| practical(adjective, running, working, functional, functioning) |
| running(verb, adjective, practical, working, operative) |
| useable |
| in force(expression, adjective, idiom, active, running) |
| operation |
| serviceable(adjective, functional) |
| efficacious |
| viable(adjective, running, functional, functioning) |