mathematics, logic Such that the arguments or roles can be interchanged.

Roget 12: reciprocal, mutual, commutual^†, correlative, reciprocative, interrelated, closely related; alternate; interchangeable; interdependent; international; complemental, complementary.   

Roget 148: interchanged etc. v.; reciprocal, mutual, commutative, interchangeable, intercurrent^†.    combinatorial [Math.].    recombinant [Biol.].   

Roget 794: commercial, mercantile, trading; interchangeable, marketable, staple, in the market, for sale.    wholesale, retail.   

Capable of replacing or changing places with something else; permitting mutual substitution without loss of function or suitability:
— Interchangeable electric outlets.
— Interchangeable parts.

synonyms: exchangeable, similar, standardised, standardized.

Polish: zamienialny, wymienny, wymienialny, zamienny