What animal look like a dinosaur with sharp teeth?

If you mean living animals today, then MOST definitely other reptiles, and birds especially, as the birds evolved from THEROPOD dinosaurs - some theropod dinosaurs looked almost exactly like birds, where you could simply label them as birds.

Try looking at an emu or a cassowary and compare it to a velociraptor and other feathered dinosaurs. Also, compare a chicken to the maniraptora dinosaurs. Look at their feathers, their feet and how they walk. The resemblances are stunning but shouldn't be surprising as birds arose from the maniraptoras.

The Galapagos Tortoises, although not descendant of dinosaurs, have a good resemblance to the herbivorous, ornithischian dinosaurs, such as the ankylosaurus. Though tortoises sprawl and, unlike the dinosaurs, they don't walk upright.

A Komodo dragon has that classical, dull brownish grey look of a dinosaur, though it sprawls. A chameleon has plates on its back, which are similarly seen in a stegosaurus (again, it sprawls, unlike the dinosaur). They say a T-Rex's bite and mouth was comparable to a crocodile's.

Incidentally, a rhinoceros, which is a mammal like you and I, has a remarkable resemblance to a triceratops (the colour, the horns). Not to mention, both walk upright, UNLIKE the above reptiles I mentioned.