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: Polyps usually reproduce asexually. 
Sentence2: Polyps usually reproduce several different ways.

SOLUTION: Polyps

PROBLEM: Sentence1: Climate refers to weather over a long period of time. 
Sentence2: weather is generally described in terms of temperature and moisture.

SOLUTION: long

PROBLEM: Sentence1: Cancer is an example of a mutation in cells. 
Sentence2: mutated cells divide more often than normal cells, and grow out of control.

SOLUTION:
cells