Problem: Word: reaction

Sentence 1: When I last tried to eat strawberries I had a terrible allergic reaction.

Sentence 2: John feared his mother's reaction when she saw the broken lamp.

Same meaning?
A: different meanings

Problem: Word: cast

Sentence 1: Who cast this beautiful movie?

Sentence 2: Cast a vote.

Same meaning?
A: different meanings

Problem: Word: save

Sentence 1: I'll save you the trouble.

Sentence 2: This will save you a lot of time.

Same meaning?
A: the same meaning

Problem: Word: one

Sentence 1: Driver, noun: one who drives.

Sentence 2: This is the one I ordered.

Same meaning?
A:
the same meaning