Synonym: fortikaĵo²
| Part of speech | common noun |
|---|---|
| Hyphenation | for·tres·o |
| Singular | Plural | |
|---|---|---|
| Nominative | fortreso | fortresoj |
| Accusative | fortreson | fortresojn |
| Dutch | vesting; veste |
|---|---|
| English | fortress; stronghold |
| Faeroese | borg |
| French | bastille |
| German | Festung |
| Polish | twierdza; warownia |
| Spanish | fortaleza |