aria /äˈri-ə/ (music)

1. An air or melody, esp an accompanied vocal solo in a cantata, oratorio or opera
2. A regular strain of melody followed by another in contrast and complement, and then repeated da capo

• hard coal
• hard copies
• hard copy
• hard-copy
• hard core
• hard-core
• hard court
• hard courts
• hardcover
• hard-cured
• hard currencies
• hard currency
• hard disk
• hard disk drive
• hard disk drives
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• hard done by
• hard-drawn
• hard drinker
• hard drinkers
• hard drive
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• hard-earned
• hard edge
• harden