Permutable and Returnable

adjective

• Capable of changing sequence.
  • synonyms: transposable

adjective

• That may be returned.
  • usage: "returnable bottles and cans"; "this merchandise is returnable if you save the receipt"

• (a.) Capable of or admitting of, being returned.
• (a.) Legally required to be returned, delivered, given or rendered; as, a writ or precept returnable at a certain day; a verdict returnable to the court.