Adjective: substitutable 'súb-sti,t(y)oo-tu-bul
- (of words) interchangeable in a given context without changing the import of the expression
"In this sentence, 'happy' and 'joyful' are substitutable without altering the meaning"
- Capable of being exchanged for another or for something else that is equivalent
"The recipe called for substitutable ingredients to accommodate dietary restrictions";
- commutable
See also: exchangeable, synonymous