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: Bryophytes occupy niches in moist habitats.
Sentence2: Animals and plants that live in the same place and share resources form a community biome niche .
niches

Sentence1: If the skin is painful, seek medical attention.
Sentence2: If your skin hurts, your touch receptors will sense differences.
skin

Sentence1: For example, a fibroid is a tumor, a wart is a tumor, and cancers are tumors.
Sentence2: cells that divide uncontrollably may form a fibroid, a wart, cancer.
cancers