Noun Morphology - Master
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First Declension
puella, puellae, f. - girl
  
    
      | Case | Singular | Plural | 
  
  
    
      | Nominative | puell-a | puell-ae | 
    
      | Genitive | puell-ae | puell-ārum | 
    
      | Dative | puell-ae | puell-īs | 
    
      | Accusative | puell-am | puell-ās | 
    
      | Ablative | puell-ā | puell-īs | 
  
Second Declension Masculine
maritus, maritī, m. - husband
  
    
      | Case | Singular | Plural | 
  
  
    
      | Nominative | marit-us | marit-ī | 
    
      | Genitive | marit-ī | marit-ōrum | 
    
      | Dative | marit-ō | marit-īs | 
    
      | Accusative | marit-um | marit-ōs | 
    
      | Ablative | marit-ō | marit-īs | 
  
ager, agrī, m. - field
  
    
      | Case | Singular | Plural | 
  
  
    
      | Nominative | ager | agr-ī | 
    
      | Genitive | agr-ī | agr-ōrum | 
    
      | Dative | agr-ō | agr-īs | 
    
      | Accusative | agr-um | agr-ōs | 
    
      | Ablative | agr-ō | agr-īs | 
  
Second Declension Neuter
exemplum, exemplī, n. - example
  
    
      | Case | Singular | Plural | 
  
  
    
      | Nominative | exempl-um | exempl-a | 
    
      | Genitive | exempl-ī | exempl-ōrum | 
    
      | Dative | exempl-ō | exempl-īs | 
    
      | Accusative | exempl-um | exempl-a | 
    
      | Ablative | exempl-ō | exempl-īs | 
  
Third Declension Masculine/Feminine
mater, matris, f. - mother
  
    
      | Case | Singular | Plural | 
  
  
    
      | Nominative | māter* | mātr-ēs | 
    
      | Genitive | mātr-is | mātr-um | 
    
      | Dative | mātr-ī | mātr-ibus | 
    
      | Accusative | mātr-em | mātr-ēs | 
    
      | Ablative | mātr-e | mātr-ibus | 
  
* Nominative forms of third declension nouns are highly variable; there is no one set or common ending.
Third Declension Masculine/Feminine i-stem
urbs, urbis, f. - city
  
    
      | Case | Singular | Plural | 
  
  
    
      | Nominative | urbs* | urb-ēs | 
    
      | Genitive | urb-is | urb-ium** | 
    
      | Dative | urb-ī | urb-ibus | 
    
      | Accusative | urb-em | urb-ēs | 
    
      | Ablative | urb-e | urb-ibus | 
  
* Nominative forms of third declension nouns are highly variable; there is no one set or common ending.
** Note the extra i in the genitive plural ending: -ium, rather than simply -um.
Third Declension Neuter
nōmen, nōminis, n. - name
  
    
      | Case | Singular | Plural | 
  
  
    
      | Nominative | nōmen* | nōmin-a | 
    
      | Genitive | nōmin-is | nōmin-um | 
    
      | Dative | nōmin-ī | nōmin-ibus | 
    
      | Accusative | nōmen** | nōmin-a** | 
    
      | Ablative | nōmin-e | nōmin-ibus | 
  
* Nominative forms of third declension nouns are highly variable; there is no one set or common ending.
** The accusative forms of all neuter nouns, adjectives, and pronouns exactly match their nominative counterparts within the same number (e.g., neuter accusative singular = neuter nominative singular).
Third Declension Neuter i-stem
mare, maris, n. - sea
  
    
      | Case | Singular | Plural | 
  
  
    
      | Nominative | mare* | mar-ia*** | 
    
      | Genitive | mar-is | mar-ium*** | 
    
      | Dative | mar-ī | mar-ibus | 
    
      | Accusative | mare** | mar-ia*** | 
    
      | Ablative | mar-ī*** | mar-ibus | 
  
* Nominative forms of third declension nouns are highly variable; there is no one set or common ending.
** The accusative forms of all neuter nouns, adjectives, and pronouns exactly match their nominative counterparts within the same number (e.g., neuter accusative singular = neuter nominative singular).
*** Note the replacement of the normal ablative singlar ending -e with -ī and the extra i in the endings of the nominative, genitive, and accusative plurals.
Fourth Declension Masculine/Feminine
manus, manūs, f. - hand
  
    
      | Case | Singular | Plural | 
  
  
    
      | Nominative | man-us | man-ūs | 
    
      | Genitive | man-ūs | man-uum | 
    
      | Dative | man-uī | man-ibus | 
    
      | Accusative | man-um | man-ūs | 
    
      | Ablative | man-ū | man-ibus | 
  
Fourth Declension Neuter
genū, genūs, n. - knee
  
    
      | Case | Singular | Plural | 
  
  
    
      | Nominative | gen-ū | gen-ua | 
    
      | Genitive | gen-ūs | gen-uum | 
    
      | Dative | gen-ū | gen-ibus | 
    
      | Accusative | gen-ū | gen-ua | 
    
      | Ablative | gen-ū | gen-ibus | 
  
Fifth Declension Masculine/Feminine
rēs, reī, f. - thing, matter, situation, affair
  
    
      | Case | Singular | Plural | 
  
  
    
      | Nominative | r-ēs | r-ēs | 
    
      | Genitive | r-eī | r-ērum | 
    
      | Dative | r-eī | r-ēbus | 
    
      | Accusative | r-em | r-ēs | 
    
      | Ablative | r-ē | r-ēbus | 
  
diēs, diēī, m. - day
  
    
      | Case | Singular | Plural | 
  
  
    
      | Nominative | di-ēs | di-ēs | 
    
      | Genitive | di-ēī | di-ērum | 
    
      | Dative | di-ēī | di-ēbus | 
    
      | Accusative | di-em | di-ēs | 
    
      | Ablative | di-ē | di-ēbus |