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: Water is essential for all life on Earth. 
Sentence2: H2O is needed for all life on Eartth.

A: Earth
****
Q: Sentence1: All lizards are reptiles. 
Sentence2: Lizards are tetrapod vertebrates that produce amniotic eggs.

A: lizards
****
Q: Sentence1: When eating in any situation, try to balance variety with a small portion. 
Sentence2: Eating a variety of small portions is a way of eating that promotes good health.

A:
eating
****