convertibility

nouns

the quality of being exchangeable (especially the ability to convert a currency into gold or other currencies without restriction)
is derived from
is a type of (narrower)
the quality of being capable of exchange or interchange
is an attribute of
capable of being exchanged for or replaced by something of equal value
"convertible securities"
is an attribute of
used especially of currencies; incapable of being exchanged for or replaced by another currency of equal value