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: Results can be damaging or disastrous. 
Sentence2: Lack of immunization can be damaging or disastrous.

Answer: damaging


Question: Sentence1: Flies are insects with two wings. 
Sentence2: Flies are arthropods with two wings.

Answer: Flies


Question: Sentence1: lakes are formed by precipitation and runoff. 
Sentence2: Precipitation and runoff can create large bodies of inland water.

Answer:
precipitation