TASK DEFINITION: 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.
PROBLEM: Sentence1: healing requires rest. 
Sentence2: Healing and cell regeneration follows.

SOLUTION: healing

PROBLEM: Sentence1: Most bryophytes are small. 
Sentence2: Most in the same group as mosses are small.

SOLUTION: small

PROBLEM: Sentence1: Steroid hormones are soluble in blood. 
Sentence2: lipids are soluble in blood.

SOLUTION:
blood