The term 'kind of horn' can refer to four different types of horns: TENOR (5 letters), ALTO (4 letters), TIN (3 letters), and SHOE (4 letters). TENOR horns are brass instruments that are similar to trumpets and trombones, and are commonly used in marching bands. ALTO horns are also brass instruments, but they are larger than TENOR horns and have a mellower sound. TIN horns are small, handheld instruments made of metal, and are often used in folk music. Lastly, SHOE horns are not actually horns, but rather a curved piece of metal or plastic used to help put on shoes.