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: After about a week the larvae leave the nodules and continue to develop into adult worms. 
Sentence2: larvae leave the nodules and continue to transform until having reproductive organs.

Answer: larvae


Question: Sentence1: Skin color is another polygenic trait. 
Sentence2: Skin color is influenced by multiple genes.

Answer: Skin


Question: Sentence1: Collar cells are the work horses of the sponge. 
Sentence2: the work horses of the sponge have tiny hairs that trap the particles.

Answer:
horses