If I said rightly, “' Niggers ' is a seven letter word,” I would be mentioning the word, and when we write it, we use mention-quotes for this purpose (speech typically lacks quotes, except for the occasional air-quotes).
As with many pairs of phrasal verbs that contain antonymic particles (such as up and down), write down and write up can nonetheless function as synonyms for some senses.
読み込み専用 (read-only) のファイル・システムに対して書き込み許可を要求した。 - JM was specified and the caller does not have write permission on the object. 発音を聞く 例文帳に追加 が指定されたが、呼び出し元にはそのオブジェクトに対する書き込み権限がなかった。 - JM
