People who aren't crafty get knitting and crochet confused all the time (I can't tell you how many articles I read for Knitting in the News that seem to believe they are synonyms!), but if you either knit or crochet or both it's generally pretty easy to tell the difference. It is possible to mimic the look of knitting in crochet and vice versa, but generally the stitches formed with needles and hooks look pretty different.
One exception to that rule that's currently growing in popularity is Tunisian crochet, a method of crochet that is worked more like knitting and looks more like knitting that traditional crochet.
To make Tunisian stitches, you work loops all the way across the row, then you work your way back across the same row. There's never a need to turn the work. There is, however, a need for a longer-than-normal crochet hook (the interchangeable crochet hooks are a lot of fun because they have a cord on the end like a circular knitting needle, which is less rigid and a little easier to work with, for me anyway, than a really long solid hook).
I have experimented just a little with Tunisian; I've worked up a washcloth using Afghan Stitch or simple stitch (and it really is pretty simple), which looks like knit stitches where some stitches have been slipped with the yarn in front. There are many stitches in Tunisian crochet just as there are in regular crochet. There's even a "knit stitch" that looks identical to Stockinette Stitch and is used in Crochet Guide Amy Solovay's super sturdy dishcloth pattern. You can also check out her other Tunisian crochet patterns for a greater understanding of crochet that looks like knitting.
Have you ever worked Tunisian crochet? I'd love to hear what you think of it!