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: plant reproduction requires pollination. 
Sentence2: Plant reproduction requires insects and hummingbirds.
plant

Sentence1: Insects are the most diverse organisms on earth, with equally diverse behavior. 
Sentence2: most insects consume and are consumed by more than one species.

Insects