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: With so many does and so few older bucks, there is little competition for mating. 
Sentence2: bucks display less aggression when there are fewer older bucks.

bucks