What is the homonym for futile?

There isn't a perfect homonym for "futile" in the sense of a word that sounds exactly the same but has a different meaning.

However, there are some words that are close in sound and could be confused:

* "fuel" - This word is related to the energy source, not the concept of being pointless or ineffective.

* "future" - This word refers to time that is to come, completely unrelated to futility.

It's important to remember that homonyms are words that sound the same and have the same spelling, but different meanings. Since "futile" doesn't have a true homonym, you might consider using a synonym like "pointless", "useless", or "vain" depending on the context.