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: If there is no movement friction is zero. 
Sentence2: Movement causes the temperature of an object to increase.

A: movement
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Q: Sentence1: Genetics is the study of inheritance. 
Sentence2: Pedigrees are useful tools for studying genetics.

A: Genetics
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Q: Sentence1: DNA replication is the process in which DNA is copied. 
Sentence2: replication occurs at forks.

A:
replication
****