Acronym Soup: TDM ?

Questions

Water containing carbon dioxide under pressure is called ________?

Water found below the surface of the land?

Weapon consisting of a long, sharp edged or pointed blade fixed in a hilt (a handle that usually has a protective guard at the place where the handle joins the blade)?

What 1,300 foot column of basalt do wyoming indians want to keep people from climbing?

What african country is home to Air Ivoire?