$re = '/(?x).*\b(BLVD|BOULEVARD|DR(?:IVE)?|R(?:OA)?D|PL(?:ACE)?
|SL|CIRCLE|CT|COURT|WA?Y|ST(?:REET)?|AVE(?:NUE)?
|PKWY|(PARK)?:WAY|LN|LANE|HWY|HIGHWAY
|TRAIL$|CIR$)\b.*/';
$str = 'AST SS BLVD
OUTH AA STREET
XX EAST ST
ZZ NORTH ROAD
EST TR TRAIL';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php