westward
The US expanded westward, particularly through the Louisiana Purchase and acquisitions of Florida and California.
The United States were settled basically from east to west. Horace Greely encouraged the Western expansion.
d
The geographical direction is "south" and capitalized refers to a certain region or group, such as the South (the Confederacy) in the US Civil War.
Longitudinal waves.
southward
Alaska.
The word meaning west in geographical terms is "occidental" or "western." It refers to the direction opposite to the sunrise, where the sun sets.
P waves
P Waves
Nevada
Generally it is the geographical place beyond which an individual or state lays no claim in that direction