Question: Sentence 1: Sand of a fine grain.
Sentence 2: A stone of coarse grain.
Does grain mean the same thing in these two sentences?
============
Answer: the same meaning

Question: Sentence 1: Hey, buddy, you got a light?
Sentence 2: Can you shed light on this problem?
Does light mean the same thing in these two sentences?
============
Answer: different meanings

Question: Sentence 1: She may not make the grade.
Sentence 2: Make a stir.
Does make mean the same thing in these two sentences?
============
Answer:
different meanings