"Vocative" means "directly addressed". It makes more sense in Latin (this is where the word comes from) because the form of the noun/name changes. In English, the nouns and names don't change so we only know if a word counts as "direct address" by its position in a sentence.

Oh, that word from the answer of my another question(12 hours ago). Can you check that question for me please? You can give me your opinion then. Thank you very much.

I don't quiet understand your question nor what 'vocative' does in English.