billabong /bilˈə-bong/ (Aust)

1. A cut-off loop of a river, replenished only by floods
2. An offshoot from a river (strictly one that does not rejoin it)

• unsoundest
• unsoundly
• unsoundness
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• unsourced
• unsoured
• unsown
• unspar
• unspared
• unsparing
• unsparingly
• unsparingness
• unsparingnesses
• unsparred
• unsparring
• unspars
• unspeak
• unspeakable
• unspeakableness
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• unspeakably
• unspeaking
• unspeaks
• unspecialised
• unspecialized