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.

[EX Q]: Sentence1: Water erosion has similar consequences as wind erosion. 
Sentence2: exposure to water can cause erosion.
[EX A]: Water

[EX Q]: Sentence1: Lions live in social groups called prides. 
Sentence2: Chimpanzees live in social groups called communities.
[EX A]: groups

[EX Q]: Sentence1: For the seasoning mixture combine all ingredients. 
Sentence2: a sifter is used for separating combined ingredients.
[EX A]:
combine