Generate an overlapping word between the given two sentences. When you find the overlapping words, they don't have to match exactly, e.g., "survival" and "survive" are valid overlapping words. Little words like "the" or "of" don't count! You must generate significant words which are not the stop words.
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Question: Sentence1: Water erosion has similar consequences as wind erosion. 
Sentence2: exposure to water can cause erosion.

Answer: Water


Question: Sentence1: camouflage is used for protection by prey against predators. 
Sentence2: blending is used for protection.

Answer: protection


Question: Sentence1: cooking food requires adding heat energy. 
Sentence2: cooking meat requires adding heat energy.

Answer:
adding