bonus -a -um | Stems in -ero / -eraStems in -ro / -ra after Consonant | Genitive ending in -īus, Dative in -ī bonus -a -um Stems in -ero / -era Stems ending in -ro / -ra after Consonant Genitive ending in -īus, Dative in -ī Previous Latin Nouns: 5th Declension Next Latin Adjectives: 3rd Declension