Problem: Sentence1: He was a great actor in his time.
Sentence2: He had a time holding back the tears.
Q: Does the term time mean the same thing in both these sentences?

Answer: different meanings

Problem: Sentence1: A ranch hand.
Sentence2: Give him a hand.
Q: Does the term hand mean the same thing in both these sentences?

Answer: different meanings

Problem: Sentence1: The forces of reaction carried the election.
Sentence2: In this reaction, the acid and base will neutralize each other, producing a salt.
Q: Does the term reaction mean the same thing in both these sentences?

Answer: different meanings

Problem: Sentence1: A check on its dependability under stress.
Sentence2: He paid all his bills by check.
Q: Does the term check mean the same thing in both these sentences?

Answer:
different meanings