Question: Sentence 1: There was a dullness in his heart.
Sentence 2: Without him the dullness of her life crept into her work no matter how she tried to compartmentalize it.
Does dullness mean the same thing in these two sentences?
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Answer: the same meaning

Question: Sentence 1: They called for artillery support.
Sentence 2: He applied to the state for support.
Does support mean the same thing in these two sentences?
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Answer: different meanings

Question: Sentence 1: These terms were used with a vagueness that suggested little or no thought about what each might convey.
Sentence 2: The Conservative manifesto is a model of vagueness.
Does vagueness mean the same thing in these two sentences?
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Answer:
the same meaning