Open English Wordnet
Nouns
(n)conveniencethe quality of being useful and convenient“they offered the convenience of an installment plan”
(n)public toilet, comfort station, public convenience, convenience, public lavatory, restroom, toilet facility, wash rooma toilet that is available to the public
(n)appliance, contraption, contrivance, convenience, gadget, gizmo, gismo, widgeta device or control that is very useful for a particular job