Your terminology is not good. You are actually trying to replace a word in a range with a field/content control/bookmark.

When you say you want to use this 'variable' to fill in other paragraphs - does this mean you want just the value of this variable (ie 'designated') to be replicated in other locations or that the value of this variable causes other text to change based on other parameters?

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Andrew Lockton
Chrysalis Design, Melbourne Australia