Declension table of ?siddhiyoga

Masculine	Singular	Dual	Plural
Nominative	siddhiyogaḥ	siddhiyogau	siddhiyogāḥ
Vocative	siddhiyoga	siddhiyogau	siddhiyogāḥ
Accusative	siddhiyogam	siddhiyogau	siddhiyogān
Instrumental	siddhiyogena	siddhiyogābhyām	siddhiyogaiḥ siddhiyogebhiḥ
Dative	siddhiyogāya	siddhiyogābhyām	siddhiyogebhyaḥ
Ablative	siddhiyogāt	siddhiyogābhyām	siddhiyogebhyaḥ
Genitive	siddhiyogasya	siddhiyogayoḥ	siddhiyogānām
Locative	siddhiyoge	siddhiyogayoḥ	siddhiyogeṣu

Compound siddhiyoga -

Adverb -siddhiyogam -siddhiyogāt