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: Results can be damaging or disastrous. 
Sentence2: Lack of immunization can be damaging or disastrous.

A: damaging
****
Q: Sentence1: waxy leaves are used for storing water by some plants. 
Sentence2: waxy leaves are used for water conservation by some plants.

A: leaves
****
Q: Sentence1: Fish have a circulatory system with a two-chambered heart. 
Sentence2: trout have a circulatory system with a two-chambered heart.

A:
circulatory
****