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.

Sentence1: high pressure systems cause clear weather. 
Sentence2: Weather Clear weather usually means good visibility.
clear

Sentence1: Autumn brings the changing of the seasons. 
Sentence2: Earth 's tilt on its rotating axis causes autumn.
Autumn

Sentence1: faulting of rock in Earth 's crust causes earthquakes. 
Sentence2: Thrust faults are a result of compressional forces in the Earth's crust.

's