Declension table of ?upasādana

Neuter	Singular	Dual	Plural
Nominative	upasādanam	upasādane	upasādanāni
Vocative	upasādana	upasādane	upasādanāni
Accusative	upasādanam	upasādane	upasādanāni
Instrumental	upasādanena	upasādanābhyām	upasādanaiḥ
Dative	upasādanāya	upasādanābhyām	upasādanebhyaḥ
Ablative	upasādanāt	upasādanābhyām	upasādanebhyaḥ
Genitive	upasādanasya	upasādanayoḥ	upasādanānām
Locative	upasādane	upasādanayoḥ	upasādaneṣu

Compound upasādana -

Adverb -upasādanam -upasādanāt