Question: Here is one sentence: A check on its dependability under stress.
Here is another sentence: He paid all his bills by check.
Does the check mean the same thing in the two sentences?

Answer: different meanings

Question: Here is one sentence: The flight to Paris leaves at 7 o'clock tonight.
Here is another sentence: I took the noon flight to Chicago.
Does the flight mean the same thing in the two sentences?

Answer: the same meaning

Question: Here is one sentence: He is the Republican boss in Kentucky.
Here is another sentence: Party bosses have a reputation for corruption.
Does the boss mean the same thing in the two sentences?

Answer: the same meaning

Question: Here is one sentence: The line of men fall forward.
Here is another sentence: The most difficult task fell on the youngest member of the team.
Does the fall mean the same thing in the two sentences?

Answer:
different meanings