| Reaction-prone atoms | 20 |
| Reactionaries | 13 |
| Reactionaries of 1917 | 21 |
| Reactionaries, politically | 26 |
| Reactionary | 11 |
| Reactions from the hoity-toity | 30 |
| Reactions heard at fireworks displays | 37 |
| Reactions of surprise | 21 |
| Reactions on seeing a new baby | 30 |
| Reactions on seeing cute babies | 31 |
| Reactions to a pun | 18 |
| Reactions to a scary book excerpt? | 34 |
| Reactions to adorable babies | 28 |
| Reactions to adorableness | 25 |
| Reactions to aerialists | 23 |
| Reactions to baby pictures | 26 |
| Reactions to bad jokes | 22 |
| Reactions to bad puns | 21 |
| Reactions to cute babies | 24 |
| Reactions to cuteness | 21 |
| Reactions to cutesiness | 23 |
| Reactions to dirty tricks | 25 |
| Reactions to fireworks | 22 |
| Reactions to fireworks displays | 31 |
| Reactions to freshness? | 23 |
| Reactions to losses, maybe | 26 |
| Reactions to mice, maybe | 24 |
| Reactions to new babies | 23 |
| Reactions to no-brainers | 24 |
| Reactions to onions | 19 |
| Reactions to poetry? | 20 |
| Reactions to puppies | 20 |
| Reactions to pyrotechnics | 25 |
| Reactions to revelations | 24 |
| Reactions to shocks | 19 |
| Reactions to solar-plexus punches | 33 |
| Reactions to some goals | 23 |
| Reactions to some punches | 25 |
| Reactions to some puns | 22 |
| Reactions to spiders | 20 |
| Reactions to streakers | 22 |
| Reactions to throat tickles | 27 |
| Reactions to tough questions, maybe | 35 |
| Reactive toxin | 14 |
| Reactor | 7 |
| Reactor areas | 13 |
| Reactor core part | 17 |
| Reactor factor | 14 |
| Reactor isotope | 15 |
| Reactor monitor: abbr. | 22 |
| Reactor overseer: Abbr. | 23 |
| Reactor part | 12 |
| Reactor parts | 13 |
| Reactor safety agcy. | 20 |
| Reactor safety org. | 19 |
| Reactor safety overseer: Abbr. | 30 |
| Reactor units | 13 |
| Reactor, for short | 18 |
| Reactor-fuel containers | 23 |
| Reactor-monitoring agcy. | 24 |
| Reactor-overseeing org. | 23 |
| Reactors | 8 |
| Reacts | 6 |
| Reacts angrily toward | 21 |
| Reacts breathlessly | 19 |
| Reacts emotionally | 18 |
| Reacts fearfully | 16 |
| Reacts in fear, in a way | 24 |
| Reacts in horror | 16 |
| Reacts irritably | 16 |
| Reacts like a toddler who doesn't get what she wants, perhaps | 65 |
| Reacts slightly | 15 |
| Reacts to a "soap" | 28 |
| Reacts to a bad call | 20 |
| Reacts to a bad joke, perhaps | 29 |
| Reacts to a bear market | 23 |
| Reacts to a big buffet | 22 |
| Reacts to a blow | 16 |
| Reacts to a blow to the head | 28 |
| Reacts to a business slowdown | 29 |
| Reacts to a cad | 15 |
| Reacts to a crooner, perhaps | 28 |
| Reacts to a dropped rattle, perhaps | 35 |
| Reacts to a ghost, maybe | 24 |
| Reacts to a hammered thumb | 26 |
| Reacts to a haymaker | 20 |
| Reacts to a long speech, maybe | 30 |
| Reacts to a matinee idol, perhaps | 33 |
| Reacts to a pun | 15 |
| Reacts to a punch | 17 |
| Reacts to a raise, maybe | 24 |
| Reacts to a revelation | 22 |
| Reacts to a roundhouse | 22 |
| Reacts to a sales slowdown | 26 |
| Reacts to a shock | 17 |
| Reacts to a sour note | 21 |
| Reacts to a strong sock | 23 |
| Reacts to a sudden pain | 23 |
| Reacts to a tearjerker | 22 |
| Reacts to a threat | 18 |