| used(noun, verb, adjective, applied, practiced) |
| busy(adjective, business, action, happy, lively) |
| engaged(verb, adjective, action, active, full) |
| occupied(verb, adjective, action, happy, active) |
| working(adjective, work, active, full, busy) |
| applied(verb, adjective, applied, exerted) |
| exercised(verb, adjective, applied, exerted) |
| exerted(verb, adjective, applied, exerted) |
| hired(verb, adjective, work) |
| utilized(verb, adjective, applied) |
| performing(full, involved, occupied, working, interested) |
| exploited |
| in use(adjective, active, full, involved, busy) |
| leased(verb, hired) |
| rented(verb, adjective, hired) |
| tied up(expression, adjective, active, full, occupied) |
| at it(verb, expression, adjective, phrasal verb, active) |
| chartered |
| implemented(verb, applied) |
| made use of(verb, expression, adjective, phrasal verb) |