Declension table of upaniṣad

Feminine	Singular	Dual	Plural
Nominative	upaniṣat	upaniṣadau	upaniṣadaḥ
Vocative	upaniṣat	upaniṣadau	upaniṣadaḥ
Accusative	upaniṣadam	upaniṣadau	upaniṣadaḥ
Instrumental	upaniṣadā	upaniṣadbhyām	upaniṣadbhiḥ
Dative	upaniṣade	upaniṣadbhyām	upaniṣadbhyaḥ
Ablative	upaniṣadaḥ	upaniṣadbhyām	upaniṣadbhyaḥ
Genitive	upaniṣadaḥ	upaniṣadoḥ	upaniṣadām
Locative	upaniṣadi	upaniṣadoḥ	upaniṣatsu

Compound upaniṣat -

Adverb -upaniṣat