Does any Latin noun originally end in -r?

1. How do Latin nouns end?
2. How many Latin noun endings are there?
3. Does Latin have case endings?

How do Latin nouns end?

Accusative singular for masculine and feminine nouns always ends in '-m'; accusative plural for masculine and feminine nouns always ends in '-s'. Genitive plural of all declensions ends in '-um'. Dative and ablative plurals are always the same. In the first and second declensions, the ending is usually '-is'.

How many Latin noun endings are there?

A case tells the speaker or reader what the noun does or is doing, and the declension of the noun decides how the case will look. In Latin, there are five declensions, and seven cases to use.

Does Latin have case endings?

There are 6 distinct cases in Latin: Nominative, Genitive, Dative, Accusative, Ablative, and Vocative; and there are vestiges of a seventh, the Locative.