Declension table of ?upasadana

Neuter	Singular	Dual	Plural
Nominative	upasadanam	upasadane	upasadanāni
Vocative	upasadana	upasadane	upasadanāni
Accusative	upasadanam	upasadane	upasadanāni
Instrumental	upasadanena	upasadanābhyām	upasadanaiḥ
Dative	upasadanāya	upasadanābhyām	upasadanebhyaḥ
Ablative	upasadanāt	upasadanābhyām	upasadanebhyaḥ
Genitive	upasadanasya	upasadanayoḥ	upasadanānām
Locative	upasadane	upasadanayoḥ	upasadaneṣu

Compound upasadana -

Adverb -upasadanam -upasadanāt