| Part of speech | common noun |
|---|---|
| Pronunciation | /ˈɹeɪ̯nbəʊ̯/ |
| Hyphenation | rain·bow |
| Plural | rainbows |
| Czech | duha |
|---|---|
| Danish | regnbue |
| Dutch | regenboog |
| English (Old English) | regnboga |
| Esperanto | ĉielarko; pluvarko |
| Finnish | sateenkaari |
| French | arc‐en‐ciel |
| German | Regenbogen |
| Hawaiian | ānuenue |
| Hungarian | szivárvány |
| Icelandic | regnbogi |
| Italian | arcobaleno |
| Jamaican Patois | rienbuo |
| Portuguese | arco‐íris |
| Saterland Frisian | Rienebooge; Woatergalle |
| Spanish | arco iris |
| Sranan | alenbo |
| Swedish | regnbåge |
| Thai | รุ้ง; รุ้งกินน้ำ |
| Turkish | alaimisema |
| Welsh | enfys |
| West Frisian | reinbôge |