Declension table of ?siddhasādhya

Masculine	Singular	Dual	Plural
Nominative	siddhasādhyaḥ	siddhasādhyau	siddhasādhyāḥ
Vocative	siddhasādhya	siddhasādhyau	siddhasādhyāḥ
Accusative	siddhasādhyam	siddhasādhyau	siddhasādhyān
Instrumental	siddhasādhyena	siddhasādhyābhyām	siddhasādhyaiḥ siddhasādhyebhiḥ
Dative	siddhasādhyāya	siddhasādhyābhyām	siddhasādhyebhyaḥ
Ablative	siddhasādhyāt	siddhasādhyābhyām	siddhasādhyebhyaḥ
Genitive	siddhasādhyasya	siddhasādhyayoḥ	siddhasādhyānām
Locative	siddhasādhye	siddhasādhyayoḥ	siddhasādhyeṣu

Compound siddhasādhya -

Adverb -siddhasādhyam -siddhasādhyāt