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.
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Question: Sentence1: Aggression is behavior that is intended to cause harm or pain. 
Sentence2: Verbal violence is behavior that is intended to cause harm or pain.

Answer: behavior


Question: Sentence1: a thermometer is used to measure temperature. 
Sentence2: a thermometer is used to measure heat.

Answer: a


Question: Sentence1: loud noises can cause animals to startle. 
Sentence2: All animals are startled by an unannounced approach, a sudden movement, or a loud noise.

Answer:
noises