Yes you can. Just use brackets. Look at this example:
<?php$one = 1;$suffix_one = "_".$one;$suffix_two = "_2";$base_1 = "VALUE ONE";$base_2 = "VALUE TWO";echo ${"base".$suffix_one}." , ".${"base".$suffix_two};?>
Result:
VALUE ONE , VALUE TWO
Obviously, like other users said, you'd better use arrays. But i answered anyway for your information.