| strenuous(adjective, activity, business, characteristic, active) |
| tireless(adjective, active, activity, business, characteristic) |
| intrusive(adjective, person, prominent, conspicuous, impertinent) |
| astir(adjective, active, activity, animated, business) |
| buzzing(adjective, activity, business, characteristic, movement) |
| crowded(adjective, activity, business, characteristic, simple) |
| hard at it(expression, idiom, activity, verb, adjective) |
| hard at work(expression, idiom, activity, adjective, feature) |
| in harness(expression, activity, occupied, working, adjective) |
| ornate(adjective, fancy, exact, complex, involved) |
| overwrought(adjective, activity, business, characteristic, excited) |
| preoccupy(verb, join, catch, interest, arrest) |
| prying(adjective, person, prominent, conspicuous, impertinent) |
| unavailable(adjective, engaged, possession, activity, business) |
| elaborate(adjective, fancy, complex, beautiful, elegant) |
| engrossed(adjective, happy, property, lively, absorbed) |
| humming(adjective, active, activity, adverb, movement) |
| laborious(adjective, work, labour, multitask) |
| laboured(adjective, activity, business, characteristic) |
| obtrusive(adjective, prominent, obvious, conspicuous, impertinent) |