Declension table of ?siddhasiddha

Masculine	Singular	Dual	Plural
Nominative	siddhasiddhaḥ	siddhasiddhau	siddhasiddhāḥ
Vocative	siddhasiddha	siddhasiddhau	siddhasiddhāḥ
Accusative	siddhasiddham	siddhasiddhau	siddhasiddhān
Instrumental	siddhasiddhena	siddhasiddhābhyām	siddhasiddhaiḥ siddhasiddhebhiḥ
Dative	siddhasiddhāya	siddhasiddhābhyām	siddhasiddhebhyaḥ
Ablative	siddhasiddhāt	siddhasiddhābhyām	siddhasiddhebhyaḥ
Genitive	siddhasiddhasya	siddhasiddhayoḥ	siddhasiddhānām
Locative	siddhasiddhe	siddhasiddhayoḥ	siddhasiddheṣu

Compound siddhasiddha -

Adverb -siddhasiddham -siddhasiddhāt