Problem: Sentence1: The hills around here fall towards the ocean.
Sentence2: His eyes fell.
Q: Does the term fall mean the same thing in both these sentences?

Answer: different meanings

Problem: Sentence1: I shall be writing to you soon.
Sentence2: It is hot in Arizona, but it is not usually humid.
Q: Does the term be mean the same thing in both these sentences?

Answer: the same meaning

Problem: Sentence1: The flight to Paris leaves at 7 o'clock tonight.
Sentence2: Where is the departure gate for flight 747? / Go straight down and to the right.
Q: Does the term flight mean the same thing in both these sentences?

Answer: the same meaning

Problem: Sentence1: When these final episodes are broadcast it will be the finish of the show.
Sentence2: "Almost an inspiration which gives to all work that finish which is almost art" -- Joseph Conrad.
Q: Does the term finish mean the same thing in both these sentences?

Answer:
different meanings