Absolute works best. Is this the worst place? Absolutely! This phrase is best to withstand and hold its characteristic when nothing else is needed to support it in a sentence. Because there is a sentence in structure proceeding Absolute we use this particular form Absolutely. "This is going to be absolutely worse!" We use absolutely in this because there is an expectation that there is a changing clause from absolute to absolutely. Another example of when to use Absolutely is when agreeing with another person. Absolutely!

If you are going to say "I picked the absolutely worst place", it is a bit wrong... it would be, " I picked the absolute worst place" otherwise use, "I picked the worst place"