| mystifying(adjective, hard, difficult, delicate, awkward) |
| onerous(adjective, difficult) |
| organization(noun, entity, form, order, body) |
| ornamented(adjective, fancy, exact, involved, busy) |
| prickly |
| racially mixed(adjective, union, unity, amalgamation, joining) |
| synthesis(noun, combination, mix, mixture, aggregate) |
| technical |
| totality(noun, entity, order, body, rule) |
| uphill(adjective, difficult) |
| variegated(adjective, involved, intricate, various) |
| wearying(adjective, difficult) |
| advanced(sophisticated, higher, elevated, developed, high-level) |
| aggregate(noun, entity, business, body, total) |
| all(noun, entity, business, body, total) |
| all things |
| ambiguous(adjective, complicated) |
| anxiety(noun, worry, problem) |
| association(noun, aggregate, composite) |
| awkward(difficult, delicate, unpleasant, tricky, complicated) |