Declension table of ?siddhasthāna

Neuter	Singular	Dual	Plural
Nominative	siddhasthānam	siddhasthāne	siddhasthānāni
Vocative	siddhasthāna	siddhasthāne	siddhasthānāni
Accusative	siddhasthānam	siddhasthāne	siddhasthānāni
Instrumental	siddhasthānena	siddhasthānābhyām	siddhasthānaiḥ
Dative	siddhasthānāya	siddhasthānābhyām	siddhasthānebhyaḥ
Ablative	siddhasthānāt	siddhasthānābhyām	siddhasthānebhyaḥ
Genitive	siddhasthānasya	siddhasthānayoḥ	siddhasthānānām
Locative	siddhasthāne	siddhasthānayoḥ	siddhasthāneṣu

Compound siddhasthāna -

Adverb -siddhasthānam -siddhasthānāt