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: Some mollusks are nearly microscopic. 
Sentence2: Some squids are nearly microscopic.
[A]: Some


[Q]: Sentence1: Warm temperatures have helped plant growth and sizing. 
Sentence2: a greenhouse helps  plant growth.
[A]: growth


[Q]: Sentence1: Winter is the coldest season. 
Sentence2: some animals' fur grows thicker for staying warm in the coldest season.
[A]:
coldest