| Part of speech | unknown part of speech |
|---|
| Singular | Plural | |
|---|---|---|
| Nominative | ateisto | ateistoj |
| Accusative | ateiston | ateistojn |
| Afrikaans | ateïs |
|---|---|
| Catalan | ateista |
| Dutch | atheïst; godloochenaar |
| English | atheist |
| Faeroese | fríteinkjari |
| French | athée |
| German | Atheist; Gottesleugner; Nichtgläubiger |
| Greek | αθεϊστής; άθεος |
| Hungarian | ateista; hitetlen |
| Latin | atheos |
| Portuguese | ateísta; ateu |
| Russian | атеист; безбожник |
| Saterland Frisian | Atheist |
| Spanish | ateísta; ateo |
| Swedish | ateist; gudsförnekare |
| Welsh | anffyddiwr |