superoctave /sooˈ, sūˈpər-ok-tiv/

1. An organ coupler giving an octave higher
2. An organ stop two octaves above the basic pitch

• cheeps
• cheer
• cheered
• cheerer
• cheerers
• cheerful
• cheerfuller
• cheerfullest
• cheerfully
• cheerfulness
• cheerfulnesses
• cheerier
• cheeriest
• cheerily
• cheeriness
• cheerinesses
• cheering
• cheerio
• cheerios
• cheerishness
• cheerishnesses
• cheerleader
• cheerleaders
• cheerless
• cheerlessly