The bottom of a car
bow
stern
The ear has a lower part called a lobe.
The main part of the boat that you walk on is called The deck. Usually known to have the best view on the boat.
stern
The lower part of the roof is called the eaves.
either calf or shin. whichever.
Higher ladies part is called Soprano, lower ladies part is called Alto, higher males part is called Tenor, and lower males part is called Bass.
It's a sailing term. "Heel" means the lower end or side of a thing on a boat. (The heel of the mast is the part that sits on the deck.) The heel of the boat itself is the bottom of the boat, and when the boat leans over in the wind you can see the bottom, so it's called "heeling over".
The forward part of a boat is called the "bow." This is the section that faces the direction of travel and is typically where the boat cuts through the water. The opposite end of the boat is known as the "stern."
lower part upper part is called Ariom i think
upper deck