【Corrode】 means to be eaten away by a chemical reaction.

• The rust will immediately 【corrode】 the brass if it is not removed.

【Erode】 means to wear away by water or wind.

• The heavy spring rains eroded the high cliffs by their house.

Note: Both of these words can also be used figuratively.

• Mistrust can 【corrode】 any good business partnership.
• Confidence in their leadership eroded over the years.

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