| Part of speech | unknown part of speech |
|---|
| Singular | Plural | |
|---|---|---|
| Nominative | asteroido | asteroidoj |
| Accusative | asteroidon | asteroidojn |
| Afrikaans | asteroïde |
|---|---|
| Czech | asteroid |
| Dutch | asteroïde; planetoïde |
| English | asteroid |
| French | astéroïde |
| German | Asteroid |
| Portuguese | asteróide |
| Saterland Frisian | Asteroide |
| Scots | asteroid |
| Spanish | asteroide |