| 100% | GAS | 3 | Laughing ___ (layman's term for the nitrous oxide used by dentists) |
| 48% | ATOMSMASHER | 11 | Layman's term for the gizmo they used to confirm the existence of the Higgs Boson in 2012 |
| 45% | ETHER | 5 | Anesthetic that used to be used by dentists, or a term for the sky |
| 42% | BLIGHTY | 7 | Term for England used by soldiers of the First and Second World Wars |
| 42% | SWAG | 4 | Slang term for an expert's rough estimate, purportedly first used by US Army General William Westmoreland in the Vietnam War |
| 39% | LAUGHING | 8 | Nitrous oxide administered by dentists: __ gas |
| 37% | PIECE | 5 | Just as slangy term for the heater mentioned in 1931's "The Silver Eagle" by W. R. Burnett |
| 36% | PAGANISM | 8 | Term for polytheism first used by early Christians |
| 36% | LAUGHINGGAS | 11 | Non-technical term for nitrous oxide |
| 35% | OPS | 3 | Short term for "operations" used in the military |
| 34% | ABA | 3 | Short term for the garment rationalized by the quote from Qur'an 33:59 |
| 34% | HEISTS | 6 | Term used in the movies for gang thefts |
| 34% | DIASTEMA | 8 | Formal term for the gap suggested by 17/18-, 35/37- and 54/57-Across |
| 34% | OAR | 3 | Abbreviation used by the 2018 Winter Olympics for the Russian competitors |
| 33% | ONEMOMENTINTIME | 15 | Whitney Houston song used by NBC for the 1988 Summer Olympics |
| 33% | PATRICIDE | 9 | Term for the crime of killing one's father |
| 33% | WANDERING | 9 | __ stars, term the ancients used for planets |
| 33% | HEROINES | 8 | Term used for female nurses who go the extra mile |
| 33% | IDIOTS | 6 | Affectionate term used by both players and fans for the members of the Red Sox in the 2004 World Series playoff push (with "The") |
| 32% | DEEPTIME | 8 | Term for the full, vast span of the world's history |
| 32% | TESTUDO | 7 | Tortoise formation used by the ancient Roman Army for protection against attack from above |
| 32% | EVILCORP | 8 | Elliot's term for the villainous conglomerate on "Mr. Robot": 2 wds. |
| 32% | SNY | 3 | Shipbuilder's term for the upward curve on old, dry, deck planks |
| 31% | MARTELLO | 8 | Small circular fort used by Britain for coastal defence at the time of the Napoleonic Wars |
| 31% | CRT | 3 | Term for which RCA held the trademark until 1951, when the corporation released its use to the public domain |
| 31% | LIB | 3 | Women's ___ (1970s term for the feminist movement) |
| 31% | LIB | 3 | Women's ___ (dated term for the feminist movement) |
| 30% | MATS | 4 | Generic term used for fabric that usually is placed on the floor (plural) |
| 30% | DOOLIE | 6 | Term for a freshman at the U.S. Air Force Academy |
| 30% | COLORITO | 8 | Italian term used for the colors in a painting |