1. (a.) Capable of being converted; transformable; interchangeable; as, a convertible automobile\.

2. (a.) Capable of being exchanged or interchanged; reciprocal; interchangeable.

all one all the same changeable coequal commutable commutative coordinate correspondent corresponding equal equalizing equiparant equipollent equivalent even exchanged give-and-take identical interchangeable interchanged liquid modifiable much the same mutual negotiable permutable reciprocal reciprocating reciprocative resolvable retaliatory returnable standard swapped switched tantamount traded transformable transitional transmutable transposed