Where can I get the actual base of nouns?

Question

Data request

In general, out of sports interest, I decided to write a smart word analyzer to select the right word by mask (it doesn’t matter if there are already such ones or not).
But I can’t find a suitable base of words in the nominative case and the singular (this also includes the names of objects and as I understand it, for example, nationality).
Those. to find all the nouns of the Russian language in the singular.
e, it doesn't matter, I'll replace it.
And it is possible and different components, I will combine.

Answer 1

What language will you write in?
speakrus.ru/dict/index.htm