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.

[EX Q]: Sentence1: Clouds are one form of condensation. 
Sentence2: Clouds are one form of changing from a gas into a liquid by reducing heat energy.
[EX A]: Clouds

[EX Q]: Sentence1: if soil is permeable then water easily flows through that soil. 
Sentence2: if soil is permeable then h2o easily flows through the soil.
[EX A]: flows

[EX Q]: Sentence1: Hookworm larvae enter the host through the skin. 
Sentence2: Hookworm can bore through intact skin.
[EX A]:
Hookworm