this has words that are obtained from various sources in the web, including the following sources:

• https://github.com/Ezhil-Language-Foundation/open-tamil
• http://www.au-kbc.org/nlp/corpusrelease.html from which we extracted only nouns. However, this list is not clean/words may not be in their root form as several categories of words here are marked as nouns.
• Tamil wikitionary

    71 Nouns-animals
    30539 Nouns-AUKBC
    156 Nouns-birds
    99 Nouns-flowers
    85254 Nouns-Open-Tamil-by Muthu Annamalai
    88245 Nouns-Propernouns
    378 Nouns-trees

• Irakava Aynakar who has compiled a list of 3000+ words and classified based on Graul's categorisation
• Some of these verb roots are obtained from: https://www.crea.in/verb-table