Confidence versus Conceit

Two different words. Are they different or synonymous? Confidence is signified by a healthy respect for ones abilities. Conceit, on the other hand, is being overconfident in ones abilities to the point where they are cocky. Confidence is a product of time. More specifically time and practice. The 10,000 hour rule comes to mind. Conceit requires no such time requirement. In fact, I would posit that there is an inverse relationship between time and conceit. In other words the more time that you invest the more that you realize what you don't know.