The term 'wisenheimer' is a slang term used to describe someone who is overly confident in their intelligence and knowledge. It can be broken down into four related terms: SMARTY (6 letters), Knowitall (9 letters), Smartalec (9 letters), and Smartaleck (10 letters). SMARTY is a term used to describe someone who is intelligent, while Knowitall is someone who believes they know everything. Smartalec and Smartaleck are similar terms used to describe someone who is overly confident in their intelligence and knowledge, often to the point of being annoying.