Declension table of siddhāsana

Masculine	Singular	Dual	Plural
Nominative	siddhāsanaḥ	siddhāsanau	siddhāsanāḥ
Vocative	siddhāsana	siddhāsanau	siddhāsanāḥ
Accusative	siddhāsanam	siddhāsanau	siddhāsanān
Instrumental	siddhāsanena	siddhāsanābhyām	siddhāsanaiḥ siddhāsanebhiḥ
Dative	siddhāsanāya	siddhāsanābhyām	siddhāsanebhyaḥ
Ablative	siddhāsanāt	siddhāsanābhyām	siddhāsanebhyaḥ
Genitive	siddhāsanasya	siddhāsanayoḥ	siddhāsanānām
Locative	siddhāsane	siddhāsanayoḥ	siddhāsaneṣu

Compound siddhāsana -

Adverb -siddhāsanam -siddhāsanāt