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.

[EX Q]: Sentence1: Precipitation falls on the windward side of the mountain range. 
Sentence2: Mountains have higher precipitation than adjacent lowlands.
[EX A]: Precipitation

[EX Q]: Sentence1: Interestingly, a squid is also a mollusk. 
Sentence2: squids have a circulatory system with one or two hearts that pump blood.
[EX A]: squid

[EX Q]: Sentence1: an anemometer is used to measure wind speed. 
Sentence2: Wind speed and severity of tornadoes is estimated by the damage caused.
[EX A]:
speed