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: hearing is used for sensing sound by animals. 
Sentence2: functioning ears are used for sensing sound by animals.

A: animals
****
Q: Sentence1: Distance is measured in meters the SI unit of distance. 
Sentence2: The SI unit of distance is in meters.

A: SI
****
Q: Sentence1: Blood pressure is highest in arteries and lowest in veins. 
Sentence2: Force on the vessel walls is highest in arteries and lowest in veins.

A:
arteries
****