Q: Sentence (1) It is a job requiring serious application.
Sentence (2) December 31 is the deadline for MBA applications.. Word: application.
==--==
A: different meanings

Q: Sentence (1) Some students had stolen the key to the final exam.
Sentence (2) Some students cheated by using the answer key.. Word: key.
==--==
A: the same meaning

Q: Sentence (1) Shop til you drop.
Sentence (2) A single shot was fired and the bird dropped from the sky.. Word: drop.
==--==
A:
the same meaning