Q: Sentence (1) The addition of cinnamon improved the flavor.
Sentence (2) He was a new addition to the staff.. Word: addition.
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A: different meanings

Q: Sentence (1) He didn't make the choir after his voice changed.
Sentence (2) You have to spend money to make money!. Word: make.
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A: the same meaning

Q: Sentence (1) A course of bricks.
Sentence (2) On a building that size, two crews could only lay two courses in a day.. Word: course.
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A:
the same meaning