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CaseSingularPlural
Nominativeименительный · кто? что?стадион стадионы the subject: who or what acts
Accusativeвинительный · кого? что?стадион стадионы the direct object of the verb
Genitiveродительный · кого? чего?стадиона стадионов possession, absence, "of"-phrases
Dativeдательный · кому? чему?стадиону стадионам the receiver: to or for someone
Instrumentalтворительный · кем? чем?стадионом стадионами the tool or companion: with, by
Prepositionalпредложный · о ком? о чём?стадионе стадионах location and topics: in, at, about

Стадион is a masculine noun; the ending pattern above repeats across most masculine nouns, so every table you learn makes the next one cheaper.

Look up any other word in the Russian declension tool, see where стадион ranks in the most common Russian words, or start from Russian cases explained if the table above is new territory. More vocabulary lives in Russian words by topic and Russian phrases.

12 forms is a table. Using them is a skill.

Slova drills стадион and every word like it with typed case endings, checked letter by letter.

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