Archives
All Russian nouns we can split into several groups: animate and inanimate nouns; by grammatical gender (masculine, neuter, feminine); by declension (first declension, second declension, third declension, words with adjectival declension, indeclinable nouns, nouns with mixed declension); or by type of nouns (common nouns, proper nouns, concrete, abstract, collective). Following this link you can find more about Russian grammar.
