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: if soil is permeable then water easily flows through that soil. 
Sentence2: if soil is permeable then h2o easily flows through the soil.
flows

Sentence1: Heterotrophs are living things that cannot make their own food. 
Sentence2: food contains organic molecules.
food

Sentence1: the looseness of soil has a positive impact on a plant 's roots' growth in that soil. 
Sentence2: the looseness of dirt or compost has a positive impact on a plant's roots' growth.

growth