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: Output of the fan is varied by means of a series of adjustable vanes upstream of the impeller. 
Sentence2: fan speed is adjustable.

adjustable