interchangeable -- ((mathematics, logic) such that the arguments or roles can be interchanged; "the arguments of the symmetric relation, `is a sister of,' are interchangeable")
exchangeable, interchangeable, similar, standardized, standardised -- (capable of replacing or changing places with something else; permitting mutual substitution without loss of function or suitability; "interchangeable electric outlets" "interchangeable parts")
(Sound)
