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: Interest in fossils is worldwide. 
Sentence2: paleontologists study something with worldwide interest.
Interest

Sentence1: rain causes erosion. 
Sentence2: Soil Erosion Soil erosion is what happens when soil is washed or blown away.
erosion

Sentence1: Animals adapt to cold temperatures. 
Sentence2: And in winter it s very cold.

cold