| Part of speech | unknown part of speech |
|---|
| Singular | Plural | |
|---|---|---|
| Nominative | antibiotiko | antibiotikoj |
| Accusative | antibiotikon | antibiotikojn |
| Afrikaans | antibiotikum |
|---|---|
| Czech | antibiotikum |
| Danish | antibiotikum |
| Dutch | antibioticum |
| English | antibiotic |
| French | antibiotique |
| German | Antibiotikum |
| Greek | αντιβιοτικό |
| Hungarian | antibiotikum |
| Italian | antibiotico |
| Papiamento | antibiótika |
| Polish | antybiotyk |
| Portuguese | antibiótico |
| Saterland Frisian | Antibiotikum |
| Spanish | antibiótico |
| Thai | ยาปฏิชีวนะ; ยาปาฎิชีวนะ |
| West Frisian | antibiotikum |