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: Basically, heat is energy. 
Sentence2: If food is not immediately used in the body for heat then that food is stored in the body for future use.

heat