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.
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Question: Sentence1: Boiling water can cause burns. 
Sentence2: heating water can cause burns.

Answer: water


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

Answer: long


Question: Sentence1: Roots have primary and secondary meristems for growth in length and width. 
Sentence2: roots have different meristems.

Answer:
Roots