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: Combustion-related, motor vehicles, wood burning, open burning, industrial processes. 
Sentence2: Combustion is used to produce heat.

A: Combustion-related
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Q: Sentence1: Results can be damaging or disastrous. 
Sentence2: Lack of immunization can be damaging or disastrous.

A: damaging
****
Q: Sentence1: Just like bricks are the building blocks of a home, atoms are the building blocks of matter . 
Sentence2: Cells are the microscopic building bricks of organisms.

A:
bricks
****