The accusative case is most easily recognized in its singular form by the nun (ν) case ending in the first (-αν, -ην) and second (-ον) declensions (for declension, see NOUN). The plural endings are -ας in the first declension and -ους in the second declension. Third declension masculine and feminine nouns and adjectives end in either nun (-ν) or alpha (-α) in the singular and -ας in the plural. Neuter nouns and adjectives always have the same form in the accusative as