Yes,
Every starch can be converted to sugar and fermented to alcohol.
For rice they use Koji mold and ferment it to Sake.
Potatoes use a small amount of barley to start to breakdown of starch and after fermentation and distilling you have vodka.
Barley (or other grains) alone can produce alcohol to beer or after distillation whiskey,…
Even in some African countries they use plantains (starchy bananas simplified) and chew on them and spit it out to make a beer. Your saliva breaks the starch down to sugar making it possible to ferment
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