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.

Q: Sentence1: a pulley is used for lifting objects. 
Sentence2: Resistance exercises are weight-lifting exercises.

A: lifting
****
Q: Sentence1: Moisture is required for the microorganisms to grow. 
Sentence2: Moisture can cause infections to grow.

A: Moisture
****
Q: Sentence1: Most chemical reactions are exothermic. 
Sentence2: heating an egg causes a exothermic reaction in the egg.

A:
exothermic
****