How do I...MySQL %LIKE% query

[eblivion]

How do I query the database using LIKE for an array but getting only results containing the full words instead of parts of it.

Here's a little chunk of what I have so far:

$keywords = explode(' ',$searchterm) ;

for ($i = 0; $i < sizeof($keywords); $i++){
$sql5b .= "description LIKE '%{$keywords[$i]}%'";
}

I have the query working, the problem is if one of the keywords is "class", the query will return results for: class, classic, midclass, classify, etc....

What I want to know is how to do the query where it will only return results for the word class and not other words containing it.