Do any non-second-declension neuter nouns end in m?

1. What are the endings of 2nd declension neuter nouns?
2. What ending do most neuter second declension nouns have in the nominative singular?
3. Are all second declension nouns masculine?
4. What are the two rules for neuter nouns in Latin?

What are the endings of 2nd declension neuter nouns?

The 2nd declension is subdivided into two different forms of noun, one ending in -us (predominantly masculine in gender) and a second ending in -um (invariably neuter). In each type, the BASE can be found by removing that final -us or -um.

What ending do most neuter second declension nouns have in the nominative singular?

The singular nominative/accusative second declension noun ends in "-um." Regardless of the declension, the ​plural neuter nominative and accusative always ​ends in "-a." If you study Greek, you will find this alpha ending in the neuters there, as well.

Are all second declension nouns masculine?

Gender: Nouns of the Second Declension are regularly masculine or neuter. Nouns ending in -us, -er, and -ir are masculine; those ending in -um are neuter.

What are the two rules for neuter nouns in Latin?

Nominative and accusative cases of neuter nouns are always the same. The plural always ends in '-a'. Accusative singular for masculine and feminine nouns always ends in '-m'; accusative plural for masculine and feminine nouns always ends in '-s'.