Replace exact string

I'm outputting text content to my page by querying our database using a simple method, which works fine.

<cfoutput query="getPageContent" startrow="#vPageContent#" maxrows="1">#vContent#</cfoutput>

Code (markup):

I need to replace certain words to make them bold, for example...

<cfset request.vContent = replace(request.vContent, "phrase", "<B>phrase</B>, "ALL")>

Code (markup):

This works, but there is a slight issue, because it will also replace occurances of the word 'phrase' even if it is within another word...

for example, cophrasetastic

So i need to replace only the exact phrase when used on it's own.

My problem appears quite simple, but I have not found a way to do this...?

 

Change:
replace(request.vContent, "phrase", "<B>phrase</B>, "ALL")

To:
replace(request.vContent, " phrase ", " <B>phrase</B> ", "ALL")

If you want to catch commas and punctuation as well, then you can use a regex to match only the characters you want.