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: Excretion is the process of removing wastes and excess water from the body. 
Sentence2: Once the water is removed, the waste becomes a semi- solid mass and is prepared for excretion.

Excretion