| 100% | ATWAR | 5 | Like the U.S. and Spain in 1898 |
| 64% | ENEMY | 5 | Spain, to the U.S. in 1898 |
| 59% | DOMED | 5 | Like the U.S. Capitol and the Taj Mahal |
| 58% | OAS | 3 | The U.S. and Can. are in it |
| 57% | GUAM | 4 | Territory ceded by Spain to the U.S. in 1898 |
| 56% | SILENT | 6 | Like the "s" in "aisle" and "island" |
| 55% | UNITED | 6 | What the U.S. and U.K. have in common? |
| 55% | TWOPARTY | 8 | Like the U.S. political system, and a hint to the answers to starred clues |
| 53% | PARITY | 6 | What the U.S. and Canadian dollars had, roughly, in the early 2010s |
| 52% | VAGUE | 5 | Like the description "somewhere in the U.S." |
| 52% | DOVER | 5 | Kent County city (in the U.S. and in England) |
| 51% | PRIVATELY | 9 | "Between us"... or the word hidden between U and S in this puzzle's theme entries |
| 51% | ASONANT | 7 | Like the s in aisle |
| 51% | CHANGEOFPLANETS | 15 | Pluto's downgrade in 2006 and the like? |
| 51% | WILSON | 6 | Woodrow ___, 28th President of the U.S. and Nobel Peace Prize winner who was born in December |
| 51% | ULTRA | 5 | The U in UVA and UVB |
| 51% | PEAGREEN | 8 | Colored like the boat in Edward Lear's "The Owl and the Pussycat" |
| 50% | BATTERFRIED | 11 | Like the fish in fish and chips |
| 50% | NAVAL | 5 | Like the battles in "Master and Commander" |
| 50% | PAT | 3 | Rafter who won the US Open Men's Singles championship in 1997 and 1998 |
| 49% | SIAMESE | 7 | Like the cats in "Lady and the Tramp" |
| 49% | LINCOLN | 7 | Abraham ___, 16th President of the U.S.A. and the first to sport a beard in office |
| 49% | HARRISON | 8 | Benjamin ___, 23rd President of the U.S.A. and the fifth to sport a beard in office |
| 49% | SOUR | 4 | Like the grapes in "The Fox and the Grapes" |
| 49% | SOUR | 4 | Like the grapes in "The Fox and the Grapes"? |
| 49% | OPPOSITE | 8 | Like the prepositions in 23-, 35- and 46-Across |
| 49% | JAMES | 5 | ___ A. Garfield, 20th President of the U.S.A. and the fourth to sport a beard in office |
| 49% | OVAL | 4 | Like the U.S. president's office |
| 48% | BASIL | 5 | Herb pronounced differently in the U.S. and U.K. |
| 48% | GAY | 3 | Like the lead characters in "Love, Simon" and "Love, Victor" |