Q: Sentence (1) The surface had a greasy feeling.
Sentence (2) She had a feeling of euphoria.. Word: feeling.
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A: different meanings

Q: Sentence (1) The letter of a room.
Sentence (2) There are twenty-six letters in the English alphabet.. Word: letter.
==--==
A: different meanings

Q: Sentence (1) They are up to date.
Sentence (2) We haven't heard from them to date.. Word: date.
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A:
the same meaning