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: melting is when solids are heated above their melting point. 
Sentence2: Ice is a solid, it's cold and it's hard.
solids

Sentence1: an animal requires air for survival. 
Sentence2: The Moon has no atmosphere and no air.
air

Sentence1: Annelids have bodies that are segmented. 
Sentence2: The familiar earthworm has a segmented body.

bodies