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: Boiling water can cause burns. 
Sentence2: heating water can cause burns.
water

Sentence1: Blood is a fluid connective tissue. 
Sentence2: A fluid connective tissue carries oxygen to the brain.
connective

Sentence1: During infancy, babies learn whether to trust the world. 
Sentence2: Babies learn most during their rapid growth period.

During