| 100% | YAWN | 4 | Reaction that's strangely contagious |
| 47% | RASH | 4 | Skin reaction that's treatable with calamine lotion |
| 42% | INFLUENZA | 9 | Contagious illness that's worse than a cold |
| 42% | OXIDATION | 9 | Reaction that may cause redness |
| 41% | TALL | 4 | Starbucks size that's on the shorter end, strangely enough |
| 41% | GASP | 4 | Reaction that indicates "I'm shocked!" |
| 41% | ALLERGIES | 9 | Reactions that may cause sneezing, hives |
| 39% | GASP | 4 | Shocked reaction that rhymes with "rasp" |
| 39% | GASP | 4 | Shocked reaction that rhymes with "wasp" |
| 38% | OOH | 3 | "That's gotta hurt!" reaction |
| 38% | YAWN | 4 | Act that's "contagious" |
| 38% | METABOLIC | 9 | Kind of reaction that triggers a breakdown? |
| 37% | BEESTING | 8 | Honey-maker's attack that can provoke an allergic reaction: 2 wds. |
| 37% | FUSION | 6 | Type of nuclear reaction that Ivy Mike generated |
| 36% | RASH | 4 | Skin reaction that you might put calamine lotion on |
| 35% | YAWN | 4 | Reflex that really is contagious |
| 35% | STRAW | 5 | The ___ that broke the camel's back (minor action that caused a big reaction) |
| 35% | CATALYST | 8 | Trigger that starts a reaction |
| 35% | ENZYME | 6 | Chemical that facilitates a reaction |
| 35% | EPOXY | 5 | Glue that requires a reaction |
| 34% | PANAMA | 6 | Hat that originated in Ecuador, strangely |
| 34% | LABEXPERIMENT | 13 | Action that may produce a reaction |
| 34% | STIMULI | 7 | Things that cause a particular reaction |
| 34% | CATALYST | 8 | Substance that accelerates a chemical reaction |
| 34% | CATALYST | 8 | Substance that boosts a chemical reaction |
| 34% | CATALYST | 8 | Substance that precipitates a chemical reaction |
| 34% | CATALYST | 8 | Substance that speeds up a reaction |
| 34% | INITIATOR | 9 | Substance that starts a chain reaction |
| 34% | PAMPERO | 7 | S American wind that blows across the plains |
| 34% | ENZYME | 6 | Substance that speeds up biochemical reactions |