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: High Nitrogen High nitrogen causes rapid growth. 
Sentence2: Causes of rapid growth are found in proteins, nucleic acids, and chlorophyll.

rapid