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.

Sentence1: healing requires rest. 
Sentence2: Healing and cell regeneration follows.
healing

Sentence1: if fossils of a water animal or plant are found in a place then that place used to be covered by water in the past. 
Sentence2: Fossils of a water animal or plant are located in water-laid sediments.
animal

Sentence1: Electricity Electricity is used to power vehicles by an electric motor. 
Sentence2: Wind can be used to power Tesla automobiles.

power