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.
Q: Sentence1: Many warm-blooded animals control their body temperature by sweating or panting. 
Sentence2: warm-blooded creatures control their body temperature by sweating or panting for survival.
A: 
body