A person of eccentric habits is often referred to as a 'CRANK, ' which is a five-letter word. A CRANK is someone who has unusual or unconventional behavior, often seen as strange or annoying by others. They may have an odd way of dressing, speaking, or behaving that sets them apart from the rest of society. Cranks are often seen as eccentric, and their behavior can be seen as humorous or entertaining.