These growth stocks look poised to rebound.It would be nice if stocks only went straight up, as that would make investing a lot easier. However, even growth stocks will fall in price from their highs. These stock dips, though, can often be good opportunities to scoop up a stock at a more attractive price.Let's look at two growth stocks down 20% or more that investors can consider buying.1. Chipotle Mexican GrillChipotle Mexican Grill (CMG -1.12%) has been one of the best-performing restaurant stocks over th ...