substitute
noun
a person or thing acting or serving in place of another.
Used to describe an ongoing action or continuous state that will be taking place in the future.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
I arrived at 12 from the Altar of the 12 Gods in the Agora at Athens, though I’ve substituted Hades for Demeter and will be substituting Dionysus for Hestia.
From New York Times ● Feb. 24, 2012