Brain Workout

My brain is a bit slow when I saw this brain teaser thingamajig in my google homepage today. I wanted to brush it off as my brain was cringing at the thought of a workout. But I hung on and before I knew it, I got it solved.

Can you? It is quite brilliant.

Each word from Group A can be paired with a different word from Group B, creating ten pairs. The pairings are all created using the same reasoning. What are the pairings? What is the link?

Group A: come, dark, early, easy, in, left, slow, strikeout, tall, win
Group B: eat, find, heavy, living, open, run, safe, soft, stop, wrong

pearlie
Source: http://www.braingle.com/