TASK DEFINITION: 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.
PROBLEM: Sentence1: Climate Forests stabilize climate. 
Sentence2: forests stabilize what is generally described in terms of temperature and moisture.

SOLUTION: Forests

PROBLEM: Sentence1: if an object is made of a material then that object has the properties of that material. 
Sentence2: An object is an item in the real world.

SOLUTION: object

PROBLEM: Sentence1: matter vibrating can cause sound. 
Sentence2: Energy strikes the molecule, causing it to vibrate more vigorously.

SOLUTION:
vibrating