Declension table of siddhayoga

Masculine	Singular	Dual	Plural
Nominative	siddhayogaḥ	siddhayogau	siddhayogāḥ
Vocative	siddhayoga	siddhayogau	siddhayogāḥ
Accusative	siddhayogam	siddhayogau	siddhayogān
Instrumental	siddhayogena	siddhayogābhyām	siddhayogaiḥ siddhayogebhiḥ
Dative	siddhayogāya	siddhayogābhyām	siddhayogebhyaḥ
Ablative	siddhayogāt	siddhayogābhyām	siddhayogebhyaḥ
Genitive	siddhayogasya	siddhayogayoḥ	siddhayogānām
Locative	siddhayoge	siddhayogayoḥ	siddhayogeṣu

Compound siddhayoga -

Adverb -siddhayogam -siddhayogāt