Antonyms of adj returnable

1 sense of returnable

Sense 1
returnable (vs. nonreturnable) -- (that may be returned; "returnable bottles and cans"; "this merchandise is returnable if you save the receipt")

nonreturnable (vs. returnable) -- (that may not be returned; "nonreturnable bottles cannot be exchanged for a deposit"; "sale merchandise is nonreturnable")

Similarity of adj returnable

1 sense of returnable

Sense 1
returnable (vs. nonreturnable) -- (that may be returned; "returnable bottles and cans"; "this merchandise is returnable if you save the receipt")
       => revertible -- (to be returned to the former owner or that owner's heirs)