convenience (
http://definr.com/convenience)
n 1: the state of being suitable or opportune; "chairs arranged
for his own convenience"
2: the quality of being useful and convenient; "they offered
the convenience of an installment plan" [ant:
inconvenience]
3: a toilet that is available to the public [syn: {public
toilet},
comfort station,
public lavatory,
restroom,
wash room]
4: a device that very useful for a particular job [syn:
appliance,
contraption,
contrivance,
gadget,
gizmo,
gismo,
widget]