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: When it rains, the roots absorb water quickly and the plants store the water in the stems. 
Sentence2: Some plants store water after absorbing it with the roots.

roots