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: Thus, if I put salt on the doorstep, it will melt the ice because there is a relationship between the melting point of ice and the salinity of water. 
Sentence2: pouring salt on an icy doorstep will reduce the melting point of the ice, making it easier to remove as the ice changes from a solid to a liquid at a lower temperature.

doorstep