Declension table of upādāna

Neuter	Singular	Dual	Plural
Nominative	upādānam	upādāne	upādānāni
Vocative	upādāna	upādāne	upādānāni
Accusative	upādānam	upādāne	upādānāni
Instrumental	upādānena	upādānābhyām	upādānaiḥ
Dative	upādānāya	upādānābhyām	upādānebhyaḥ
Ablative	upādānāt	upādānābhyām	upādānebhyaḥ
Genitive	upādānasya	upādānayoḥ	upādānānām
Locative	upādāne	upādānayoḥ	upādāneṣu

Compound upādāna -

Adverb -upādānam -upādānāt