Declension table of ?siddhasādhya

Neuter	Singular	Dual	Plural
Nominative	siddhasādhyam	siddhasādhye	siddhasādhyāni
Vocative	siddhasādhya	siddhasādhye	siddhasādhyāni
Accusative	siddhasādhyam	siddhasādhye	siddhasādhyāni
Instrumental	siddhasādhyena	siddhasādhyābhyām	siddhasādhyaiḥ
Dative	siddhasādhyāya	siddhasādhyābhyām	siddhasādhyebhyaḥ
Ablative	siddhasādhyāt	siddhasādhyābhyām	siddhasādhyebhyaḥ
Genitive	siddhasādhyasya	siddhasādhyayoḥ	siddhasādhyānām
Locative	siddhasādhye	siddhasādhyayoḥ	siddhasādhyeṣu

Compound siddhasādhya -

Adverb -siddhasādhyam -siddhasādhyāt