Interchangeable

a.	1.
	1.	Admitting of exchange or mutual substitution.
	2.	Following each other in alternate succession; as, the four interchangeable seasons.

Adj.	1.	interchangeable - of or relating to or suggestive of complementation; "interchangeable electric outlets" Synonyms: reciprocal, complementary
	2.	interchangeable - (mathematics, logic) such that the arguments or roles can be interchanged; "the arguments of the symmetric relation, `is a sister of,' are interchangeable"
	3.	interchangeable - capable of replacing or changing places with something else; "interchangeable parts" Synonyms: standardised, standardized, exchangeable, similar

alike, assignable, changeable, communicable, commutable, commutative, conductive, consignable, contagious, convertible, conveyable, equal, equalizing, equivalent, even, exchangeable, exchanged, expressable, give-and-take, impartable, indiscernible, indistinct, indistinctive, indistinguishable, interchanged, mailable, metathetic, movable, mutual, permutable, portable, portative, reciprocal, reciprocating, reciprocative, removable, retaliatory, returnable, standard, stereotyped, substitutable, swapped, switched, traded, transferable, transfusable, transmissible, transmissive, transmittable, transportable, transportative, transposable, transposed, undifferentiated, undiscriminated, undistinguishable, undistinguished, uniform, without distinction