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WordNet-Online 
 
Noun monongahela river has 1 sense 
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| monomorium monomorium minimum monomorium pharaonis monomorphemic monomper mononeuropathy monongahela monongahela pa monongahela river mononuclear mononuclear phagocyte system mononucleate mononucleosis mononychus olecranus monooiths monopartner monopause 
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