- பெயர் இயற்சொல்Peyar IyarcholAn இயற்சொல் type: a native root word that names something - a noun in its original, unaltered Tamil form.
- வினை இயற்சொல்Vinai IyarcholAn இயற்சொல் type: a native root word for an action - a verb-root in its original, unaltered Tamil form, before any tense or person is added.