| Part of speech | common noun |
|---|
| Afrikaans | reaksie |
|---|---|
| Catalan | reacció |
| Czech | odezva; reakce |
| Dutch | reactie |
| English | reaction |
| Esperanto | reakcio; reago |
| Finnish | vastavaikutus |
| French | réaction |
| German | Reaktion |
| Icelandic | viðbragð |
| Low German | reakty; reaksioon; reaksy |
| Papiamento | reakshon |
| Portuguese | reaçcão |
| Saterland Frisian | Reaktion |
| Spanish | reacción |
| Swedish | reaktion |