Calliope /kə-līˈə-pi or kaˈli-ōp/

1. The Muse of epic poetry (Gr myth)
2. (without cap) a keyboard musical instrument similar to an organ, with a set of whistles operated by steam or compressed air

• ballons
• balloon
• balloon angioplasties
• balloon angioplasty
• balloon-back
• balloon barrage
• balloon barrages
• balloon catheter
• balloon catheters
• ballooned
• ballooning
• balloonings
• balloonist
• balloonists
• balloons
• balloon tyre
• balloon tyres
• balloon-vine
• balloon-vines
• balloon whisk
• balloon whisks
• ballot
• ballot box
• ballot boxes
• balloted