| 100% | APNEA | 5 | Sleep ___ (disorder that makes it hard to breathe) |
| 67% | FOG | 3 | Weather that makes it hard to see |
| 66% | ADHD | 4 | Condition that makes it hard to focus (abbr.) |
| 66% | FOG | 3 | Weather condition that makes it hard to see |
| 58% | ADHD | 4 | Condition that can make it hard to focus |
| 57% | ROCKER | 6 | Piece that might make it hard to sit still |
| 50% | SCARY | 5 | Sharing ___ stories can make it hard to fall asleep at night |
| 49% | ESOBESO | 7 | Paul Anka hit that made it to #19 |
| 49% | APNEA | 5 | Disorder that stops breathing during sleep |
| 47% | KING | 4 | Checker that makes it to the other side of the board |
| 47% | OPACITY | 7 | It makes it hard or impossible to see through |
| 46% | TOTS | 4 | "Tiny ___ with their eyes all aglow will find it hard to sleep tonight" |
| 46% | LISP | 4 | Speech impediment that makes it difficult to say "speech" |
| 45% | BONINESS | 8 | Supervisor + 9 = Quality that makes a fish hard to eat |
| 45% | CAMO | 4 | Combat apparel that makes it easier to hide, for short |
| 45% | SLITS | 5 | Skirt features that make it easier to walk up stairs |
| 45% | CAMO | 4 | Pattern that makes hunters or soldiers hard to see, for short |
| 44% | PLUSHIE | 7 | Toy that's not hard to make? |
| 44% | TINTS | 5 | Window treatments that make them hard to see through from the outside |
| 44% | SORE | 4 | ___ throat, ailment that makes it difficult to swallow |
| 43% | TAMPS | 5 | Crushes the earth to make it hard |
| 42% | ENDS | 4 | It's sometimes hard to make them meet |
| 40% | DEADENDSTREET | 13 | Where it's hard to make a wrong turn |
| 40% | NEARAS | 6 | "As ___ dammit": so close to being dead on that it really makes no difference |
| 40% | REACH | 5 | Make it to |
| 40% | ATTEND | 6 | Make it to |
| 39% | BURYYOURHEADINTHESAND | 21 | "___, and it may be hard to breathe" |
| 39% | FAINT | 5 | Hard to make out |
| 39% | SHADOWY | 7 | Hard to make out |
| 39% | BLURRY | 6 | Hard to make out |