mobile nouns, [409];

nouns of common, [410];

epicenes, [411];

variable, [413], [586], [597];

general rules of, [402-413];

of diminutives, [270];

of inanimate things, [403];

of Greek words, [570];

of -ā- stems, [432], [433];

of -o- stems, [446], [447];