| Underlying premise | 18 |
| Underlying patterns | 19 |
| Underlying pattern of the universe | 34 |
| Underlying motif | 16 |
| Underlying meaning | 18 |
| Underlying layer | 16 |
| Underlying idea | 15 |
| Underlying form of a word | 25 |
| Underlying explanation | 22 |
| Underlying character | 20 |
| Underlying cause | 16 |
| Underlying but unproven truths | 30 |
| Underlying | 10 |
| Underlit | 8 |
| Underlining equiv. | 18 |
| Underlings: Abbr. | 17 |
| Underlings of sgts. | 19 |
| Underlings of a capt. | 21 |
| Underlings follow them | 22 |
| Underlings | 10 |
| Underling's assignment | 26 |
| Underling's acquiescence | 28 |
| Underling to a capt. | 20 |
| Underling of yore | 17 |
| Underling of the 11th century | 29 |
| Underling of old | 16 |
| Underling of Fearless Leader | 28 |
| Underling of 1066 | 17 |
| Underling in 1066 | 17 |
| Underling (abbr.) | 17 |
| Underling | 9 |
| Underlines | 10 |
| Underlined text, perhaps | 24 |
| Underlined | 10 |
| Underline, say | 14 |
| Underline alt. | 14 |
| Underline | 9 |
| Underlies | 9 |
| Underlayer of skin | 18 |
| Underhandedly obtain | 20 |
| Underhandedly clever | 20 |
| Underhanded, to put it nicely | 29 |
| Underhanded, in a way | 21 |
| Underhanded types | 17 |
| Underhanded type | 16 |
| Underhanded throw | 17 |
| Underhanded tactic | 18 |
| Underhanded sort | 16 |
| Underhanded schemes | 19 |
| Underhanded schemer | 19 |
| Underhanded plan | 16 |
| Underhanded or duplicitous | 26 |
| Underhanded one | 15 |
| Underhanded Massive Attack song? | 32 |
| Underhanded fling | 17 |
| Underhanded fellow | 18 |
| Underhanded course of action | 28 |
| Underhanded commercial ploy | 27 |
| Underhanded change, slangily | 28 |
| Underhanded change | 18 |
| Underhanded bum | 15 |
| Underhanded attack | 18 |
| Underhanded activities | 22 |
| Underhanded | 11 |
| Underhand? | 10 |
| Underhand toss | 14 |
| Underhand throw | 15 |
| Underhand ploy | 14 |
| Underhand doings | 16 |
| Underhand arrest maneuver | 25 |
| Underhand | 9 |
| Undergrown | 10 |
| Undergroundgrowth | 17 |
| Underground-railroad cargo | 26 |
| Underground ___ | 15 |
| Underground workplace | 21 |
| Underground workers | 19 |
| Underground worker, perhaps | 27 |
| Underground worker | 18 |
| Underground work site | 21 |
| Underground wealth | 18 |
| Underground way | 15 |
| Underground water tank | 22 |
| Underground water sources | 25 |
| Underground water source | 24 |
| Underground water carrier | 25 |
| Underground waste | 17 |
| Underground vein | 16 |
| Underground vegetable with edible greens | 40 |
| Underground vegetable | 21 |
| Underground vault | 17 |
| Underground type | 16 |
| Underground tunneler | 20 |
| Underground treasures | 21 |
| Underground treasure | 20 |
| Underground transportation | 26 |
| Underground transport systems | 29 |
| Underground transport | 21 |
| Underground trains | 18 |
| Underground tombs | 17 |