Problem: Sentence1: How could you do such a thing?
Sentence2: He has a thing about seafood.
Q: Does the term thing mean the same thing in both these sentences?

Answer: different meanings

Problem: Sentence1: The company laid off all the workers when they tried to unionize.
Sentence2: We don't allow people to come into our plant and try to unionize the workers.
Q: Does the term unionize mean the same thing in both these sentences?

Answer: the same meaning

Problem: Sentence1: Fall prey to an imposter.
Sentence2: Her hair fell across her forehead.
Q: Does the term fall mean the same thing in both these sentences?

Answer: different meanings

Problem: Sentence1: To start a rumour.
Sentence2: Start a new job.
Q: Does the term start mean the same thing in both these sentences?

Answer:
different meanings