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: Moisture is required for the microorganisms to grow. 
Sentence2: Moisture can cause infections to grow.

Answer: Moisture


Question: Sentence1: Mollusks are invertebrates such as the common snail. 
Sentence2: Another common snail is the decollate snail.

Answer: snail


Question: Sentence1: webbed feet are used for moving faster through water by aquatic animals. 
Sentence2: Ducks have webbed feet, designed for swimming.

Answer:
webbed