You'll need to download the 610,000+ entries from the Moby Project: http://icon.shef.ac.uk/Moby/
Save this PHP code in the same folder as the word list you just downloaded.
$file = file('354984si.ngl');
foreach($file as $line){
$line = trim(strtoupper($line));
if(strlen($line)>6)
if(strpos($line,'A')!==FALSE)
if(strpos($line,'B')!==FALSE)
if(strpos($line,'C')!==FALSE)
if(strpos($line,'D')!==FALSE)
if(strpos($line,'E')!==FALSE)
if(strpos($line,'F')!==FALSE)
if(strpos($line,'G')!==FALSE)
die("$line Contains every letter.");
}