2 nd Declension. GM 5. Content. General information. Paradigm of the 2 nd declension. Differences between -us / -er type and -um / -on type. Vocabulary. General information. 2 nd declension contains mainly nouns of masculine and neutral gender.
Note a difference in the stem between Nom. Sg. and Gen. Sg. of the word cancer. Technically the Nominative case has no ending, only stem. In all the remaining cases the “e” is missing from the stem and there is an ending added.