Declension table of siddhida

Neuter	Singular	Dual	Plural
Nominative	siddhidam	siddhide	siddhidāni
Vocative	siddhida	siddhide	siddhidāni
Accusative	siddhidam	siddhide	siddhidāni
Instrumental	siddhidena	siddhidābhyām	siddhidaiḥ
Dative	siddhidāya	siddhidābhyām	siddhidebhyaḥ
Ablative	siddhidāt	siddhidābhyām	siddhidebhyaḥ
Genitive	siddhidasya	siddhidayoḥ	siddhidānām
Locative	siddhide	siddhidayoḥ	siddhideṣu

Compound siddhida -

Adverb -siddhidam -siddhidāt