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: Basically the process is pretty simple. 
Sentence2: All cells share some of the same structures and simple processes.
process

Sentence1: Lancelet larvae are free-swimming. 
Sentence2: some larvae lack a hardened backbone.
larvae

Sentence1: Insects generally have two pairs of wings for flight. 
Sentence2: arachnids do not fly.

flight