| massive(adjective, hard, difficult, big, complex) |
| ponderous(adjective, hard, difficult, complex) |
| weighty(adjective, hard, difficult, complex) |
| hefty(adjective, hard, difficult, complex) |
| lumpish(adjective, hard, difficult, complex) |
| heavyweight(adjective, hard, difficult, complex) |
| leaden(adjective, hard, difficult, complex) |
| lumpy(adjective, hard, difficult, complex) |
| gargantuan(adjective, big, giant) |
| titanic(adjective, big, giant) |
| elephantine(adjective, big, giant) |
| gigantic(adjective, big, giant) |
| huge(adjective, big, giant) |
| big(adjective, informal, size, giant) |
| bulky(adjective, size) |
| colossal(adjective, big, giant) |
| enormous(adjective, big, giant) |
| immense(adjective, big, giant) |
| mammoth(adjective, big, giant) |
| monster(adjective, informal, big, giant) |