Declension table of ?siddhirasa

Masculine	Singular	Dual	Plural
Nominative	siddhirasaḥ	siddhirasau	siddhirasāḥ
Vocative	siddhirasa	siddhirasau	siddhirasāḥ
Accusative	siddhirasam	siddhirasau	siddhirasān
Instrumental	siddhirasena	siddhirasābhyām	siddhirasaiḥ siddhirasebhiḥ
Dative	siddhirasāya	siddhirasābhyām	siddhirasebhyaḥ
Ablative	siddhirasāt	siddhirasābhyām	siddhirasebhyaḥ
Genitive	siddhirasasya	siddhirasayoḥ	siddhirasānām
Locative	siddhirase	siddhirasayoḥ	siddhiraseṣu

Compound siddhirasa -

Adverb -siddhirasam -siddhirasāt