1. The capital of the American state of South Carolina. Alternatively, the name of the federal district which the American capital of Washington is part of.
2. A series of ranking tournaments for professional tennis players that is one level below the ATP World tour.
3. A popular TV channel whose logo features the earth and has a slogan called "The world is just awesome".
4. A lost continent in legend.
5. A word that means "to attempt" or "to take effort in something".
Thanks to W.P.Fey for pointing out the error in the end date