| 100% | KENO | 4 | Game introduced to the U.S. by Chinese immigrants in the 19th century |
| 50% | THREECENTPIECES | 15 | Lightest coins ever minted by the U.S., used in the late 19th century |
| 45% | AKITA | 5 | Dog breed Helen Keller introduced to the U.S. in 1937 |
| 45% | ASIANLONGHORNEDBEETLE | 21 | Tree-damaging pest accidentally introduced to the U.S. in 1996 |
| 44% | BAHAI | 5 | Monotheistic religious system founded in the 19th century by Baha'u'llah |
| 44% | GUAM | 4 | Territory ceded by Spain to the U.S. in 1898 |
| 43% | GUAM | 4 | Pacific island ceded by Spain to the U.S. in 1899 |
| 43% | WILDWEST | 8 | US frontier period in the 19th century |
| 42% | VOLLEYBALL | 10 | Ball game invented by William G Morgan whose original name in the late 19th century was Mintonette |
| 41% | BEALLYOUCANBE | 13 | Slogan introduced by the U.S. Army in 1980 (5 wds.) |
| 40% | BUSTLE | 6 | Framework worn at the back below the waist by women in the late 19th century in order to expand a skirt |
| 40% | ISAO | 4 | Pro golfer Aoki who lost to Jack Nicklaus by two strokes in the 1980 U.S. Open |
| 39% | ALASKA | 6 | Land sold by Russia to the US in 1867 |
| 39% | STAMP | 5 | Elvis Presley Forever ___, tribute to Elvis Presley that was released by the U.S. Postal Service in 2015 |
| 39% | CAPPUCCINO | 10 | NYC's Caffe Reggio in Greenwich Village claims to have introduced this drink to the US in the early 1920s |
| 39% | AMENDMENT | 9 | The 19th allowed women to vote in the US |
| 38% | SUFFRAGE | 8 | Right to vote; sought by women in the 20th century |
| 38% | WECHARGEGENOCIDE | 16 | Book-length petition presented to the U.N. by the Civil Rights Congress, in 1951 |
| 38% | CAVEANIMAL | 10 | U.S.A. ___ of the Year (award given to the little brown bat by the National Speleological Society, in 2022) |
| 38% | TOMATO | 6 | Red fruit introduced to Europe in the 16th century |
| 38% | JANISSARY | 9 | Turkish infantry guard in the 14th to 19th century |
| 37% | ENEMY | 5 | Spain, to the U.S. in 1898 |
| 37% | MARTHAGRAHAM | 12 | US choreographer named Dancer of the Century by Time magazine in 1998 |
| 37% | ARC | 3 | Type of lamp using carbon electrodes invented by Humphry Davy in the early 19th century |
| 37% | ASIANS | 6 | More than 25% of immigrants to the U.S. |
| 37% | ESL | 3 | Possible subj. for an immigrant to the U.S. |
| 37% | STCROIX | 7 | Denmark sold it to the U.S. in 1917 |
| 37% | ELCHAPO | 7 | Noted criminal extradited to the U.S. in 2017 |
| 36% | BUSTLE | 6 | Framework worn at the back below the waist by women in the late 19th-century in order to expand a skirt |
| 36% | OREGON | 6 | Home to the deepest lake and river gorge in the U.S. |