Declension table of siddhāsana

Neuter	Singular	Dual	Plural
Nominative	siddhāsanam	siddhāsane	siddhāsanāni
Vocative	siddhāsana	siddhāsane	siddhāsanāni
Accusative	siddhāsanam	siddhāsane	siddhāsanāni
Instrumental	siddhāsanena	siddhāsanābhyām	siddhāsanaiḥ
Dative	siddhāsanāya	siddhāsanābhyām	siddhāsanebhyaḥ
Ablative	siddhāsanāt	siddhāsanābhyām	siddhāsanebhyaḥ
Genitive	siddhāsanasya	siddhāsanayoḥ	siddhāsanānām
Locative	siddhāsane	siddhāsanayoḥ	siddhāsaneṣu

Compound siddhāsana -

Adverb -siddhāsanam -siddhāsanāt