| 1 | English | -ia | Used in forming names of countries, diseases,... |
| 2 | Latin | -ia | Used to form a feminine abstract noun, usually... |
| 3 | Latin | -ius | forming adjectives from nouns; nominative neuter... |
| 4 | Proto-Italic | -jōs | Forms comparative adjectives |
| 5 | Proto-Indo-European | -yós | Creates adjectives from noun or verb stems |