As a deity name
Name 695 of the Durga Sahasranāma — Kula Arnava Tantra / Skanda Purana, as taught by Lord Shiva to Goddess Parvati
As a Hindi name
Nearest attested word 'तीर्था' does not appear as a word in our Hindi sources. The nearest word is तीर्थ, meaning place of pilgrimage, holy site, tirtha. nearest word: तीर्थ — a suggestion, not a meaning
As a Sanskrit word
Meaning
a passage, way, road, ford, stairs for landing or for descent into a river, bathing-place, place of pilgrimage on the banks of sacred streams, piece of water, &c. — feminine form of tīrtha
Scripturally attestedWhy this matches what you typed
M1 · same meaning "tīrthā" is the feminine form of "tīrtha" — the same word with the feminine ending (nominative).
Dictionary citations
tīrtha n. (rarely m., MBh.) a passage, way, road, ford, stairs for landing or for descent into a river, bathing-place, place of pilgrimage on the banks of sacred streams, piece of water, RV. &c.
the path to the altar between the Cātvāla and Utkara, ṢaḍvBr. iii, 1; ĀśvŚr. iv, ix; ŚāṅkhŚr.; Lāṭy.; KātyŚr.
Caveats
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