I know when macarons become really popular, at one point in time, I confused a macaron for a macaroon & vise versa!
They are actually both very different. A macaron is a sandwiched almond cookie, with yummy fillings like buttercream, ganache or jam. Whereas, a macaroon is a dense & chewy cookie made of coconut.
We found this AMAZING inforgraphic made by Shari's Berries that explain the difference. Take a look!