| hard(adjective, person, body, difficult, complex) |
| heavyweight(adjective, hard, difficult, heavy, complex) |
| leaden(adjective, hard, difficult, heavy, complex) |
| titanic(adjective, great, big, large, huge) |
| lumpy(adjective, hard, difficult, complex, gravity) |
| oppressive(adjective, hard, difficult, heavy, complex) |
| severe(adjective, hard, difficult, complex) |
| mighty(adjective, person, body, big, large) |
| prodigious(adjective, person, body, great, big) |
| substantial(adjective, great, big, heavy, important) |
| monumental(adjective, great, big, large, huge) |
| knotty(adjective, hard, difficult, complex, density) |
| serious(adjective, hard, difficult, complex) |
| tough(adjective, person, body, hard, difficult) |
| elephantine(adjective, big, awkward, substantial, large) |
| dire(adjective, hard, difficult, complex) |
| grave(adjective, hard, difficult, complex) |
| knotted(adjective, hard, difficult, complex, density) |
| rugged(adjective, hard, difficult, complex) |
| heavy(adjective, person, body, solid, heavy) |