If you're looking for a name with a similar sound or meaning, you might consider these options:
* Zina: This is a name of Arabic origin, meaning "adornment" or "beauty."
* Zenith: This word means "the highest point reached by a celestial object," which could symbolize achievement or ambition.
* Zita: A name of Italian origin, meaning "grace" or "beauty."
It's important to note that the meaning of a name can be subjective and personal. If "Zinitha" holds special meaning for you or someone you know, then that's the most important thing.