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Synonyms for Convertible (same or very similar meaning)

WordNet sense 1 (a corporate security (usually bonds or preferred stock) that can be exchanged for another form of security (usually common stock)):
convertible security

WordNet sense 2 (a sofa that can be converted into a bed):
sofa bed

WordNet sense 3 (capable of adapting (of becoming or being made suitable) to a particular situation or use):
adaptable

WordNet sense 4 (capable of being exchanged for or replaced by something of equal value):
exchangeable

WordNet sense 5 (capable of being changed in substance as if by alchemy):
transformable, translatable, transmutable

WordNet sense 6 (subject to alteration or change):
commutable


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