substitutable
Speech parts
1. substitutable - Noun
2. substitutable - Adjective
3. substitutable - Adjective Satellite
Meaning
capable of being exchanged for another or for something else that is equivalent
(of words) interchangeable in a given context without changing the import of the expression
Source: WordNetSynonyms
commutable
allied
close
equivalent
compatible
mutual
comparable
analogous
alike
approaching
complementary
synonymous
akin
modular
reciprocal
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Antonyms
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Human capital is substitutable, but not transferable like land, labor, or fixed capital.
The pronoun is described there as "a part of speech substitutable for a noun and marked for a person."