Declension table of ?siddhikara

Masculine	Singular	Dual	Plural
Nominative	siddhikaraḥ	siddhikarau	siddhikarāḥ
Vocative	siddhikara	siddhikarau	siddhikarāḥ
Accusative	siddhikaram	siddhikarau	siddhikarān
Instrumental	siddhikareṇa	siddhikarābhyām	siddhikaraiḥ siddhikarebhiḥ
Dative	siddhikarāya	siddhikarābhyām	siddhikarebhyaḥ
Ablative	siddhikarāt	siddhikarābhyām	siddhikarebhyaḥ
Genitive	siddhikarasya	siddhikarayoḥ	siddhikarāṇām
Locative	siddhikare	siddhikarayoḥ	siddhikareṣu

Compound siddhikara -

Adverb -siddhikaram -siddhikarāt