Main entry: available, usable, useable
Definition: convenient for use or disposal
Usage: the house is available after July 1; 2000 square feet of usable office space
Main entry: usable, useable, functional, operable, operational
Definition: fit or ready for use or service
Usage: the toaster was still functional even after being dropped; the lawnmower is a bit rusty but still usable; an operational aircraft; the dishwasher is now in working order
Definition: capable of being put to use
Usage: usable byproducts