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: the ovaries are used in reproduction. 
Sentence2: Egg released by the ovary.

A: ovaries
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Q: Sentence1: adding salt to a solid decreases the freezing point of that solid. 
Sentence2: Water density decreases with temperature and increases with salt content.

A: decreases
****
Q: Sentence1: Bioterrorism is the intentional release or spread of agents of disease. 
Sentence2: The intentional release of smallpox is considered bioterrorism.

A:
intentional
****