Question: Here is one sentence: He was on the heavy side.
Here is another sentence: Look on the bright side.
Does the side mean the same thing in the two sentences?

Answer: the same meaning

Question: Here is one sentence: The expanded window will give us time to catch the thieves.
Here is another sentence: You have a two-hour window of clear weather to finish working on the lawn.
Does the window mean the same thing in the two sentences?

Answer: the same meaning

Question: Here is one sentence: Earthquakes originate far below the surface.
Here is another sentence: Three quarters of the Earth's surface is covered by water.
Does the surface mean the same thing in the two sentences?

Answer: the same meaning

Question: Here is one sentence: The teaching consists of theory lessons and case studies.
Here is another sentence: A window case.
Does the case mean the same thing in the two sentences?

Answer:
different meanings