Declension table of upāsana

Neuter	Singular	Dual	Plural
Nominative	upāsanam	upāsane	upāsanāni
Vocative	upāsana	upāsane	upāsanāni
Accusative	upāsanam	upāsane	upāsanāni
Instrumental	upāsanena	upāsanābhyām	upāsanaiḥ
Dative	upāsanāya	upāsanābhyām	upāsanebhyaḥ
Ablative	upāsanāt	upāsanābhyām	upāsanebhyaḥ
Genitive	upāsanasya	upāsanayoḥ	upāsanānām
Locative	upāsane	upāsanayoḥ	upāsaneṣu

Compound upāsana -

Adverb -upāsanam -upāsanāt