What is the opposite noun of sultana?

There isn't a single, perfect opposite noun for "sultana." It depends on what aspect of "sultana" you want to oppose. Here are a few possibilities:

Based on the fruit:

* Raisin: A sultana is a type of raisin, so any other type of raisin could be considered its opposite.

* Currant: Another dried fruit, but with a distinct flavor.

Based on the historical/cultural context:

* Sultan: A sultana is a female sultan.

* King/Queen: If considering a ruler's position, these are opposites.

* Subject: A sultana is a ruler, while a subject is ruled.

Based on the process:

* Fresh grape: A sultana is a dried grape.

Ultimately, the best opposite noun depends on the specific context and what you want to emphasize.