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: If there is no movement friction is zero. 
Sentence2: Movement causes the temperature of an object to increase.
movement

Sentence1: Metabolic rate is the rate at which food is burned for energy. 
Sentence2: thyroid hormones increase the rate of energy consumption.
energy

Sentence1: Oxygen is essential for cellular respiration for all aerobic organisms. 
Sentence2: arteries are essential for cellular respiration.

cellular