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: Skin is an epithelial lining of the exposed parts of the body. 
Sentence2: Hookworm larvae enter the host through epithelial tissue.

epithelial