function find_words() {
	
$a = mysql_query("SELECT word from dictionary")or die(mysql_error());

$results=array();
while($row=mysql_fetch_array($a)) {
$results[]=$row;
}

$replacewith = "<b>$results</b>";
$content = "Niche and There is"; //the_content();
$newData = str_replace($words, $replacewith, $content);
echo $newData;
}