Definition: 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.
Input: Sentence1: thirst is used to make an animal realize that it needs to replenish its bodily water by the body. 
Sentence2: Water Water in the area's natural water bodies is drinkable as such.

water