noun
A person, place, thing, or idea. In this case, 'wall' is a noun.
adjective
Describes or modifies a noun. In this case, 'red' is an adjective describing the color of the wall.
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The red wall in the dining room adds a touch of elegance to the space.
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I really like how the red wall in the living room makes the room feel cozy.
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That red wall in the bedroom is so lit, I love it!
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The red wall symbolizes the passion and energy of the room's occupants.