What is the Facebook equivalent to the Twitter favourite?

[Richard S]

We know that Retweet is Twitter's version of the Facebook like, but what is the Facebook equivalent to the favourite?

P.S. This question is more interesting than the stupid and boring questions about global warning and Syria.
Comic book Reader: I don't care about your opinion, oh, and top contributor my arse! How made you top contributor, some untrained monkeys?

[Ellie]

I thought differently, I thought that the retweet button was the equivalent to the share button on facebook and the favourite button was equivalent to the like button on facebook. That's just my thoughts though!

[Comicbook Reader]

If you find global warming issues and slaughter in Syria tedious and boring, I despair for your sense of priorities.

P.S. I was going to supply an answer re: FB equivalent until I read your PS.