Rhotacism is a speech impediment where the letter "r" is pronounced incorrectly. Some synonyms for rhotacism include rotacism, rhotacization, and lambdacism. Other terms used to describe speech impediments include dysarthria, stuttering, and lisping. However, not all speech impediments are the same, and it is important to distinguish between them when seeking treatment. Rhotacism can be corrected through speech therapy, where individuals are taught the correct placement and movement of their tongue and lips to properly produce the "r" sound. With consistent practice and patience, those with rhotacism can improve their speech and communicate more effectively.