Declension table of mahādevī

Feminine	Singular	Dual	Plural
Nominative	mahādevī	mahādevyau	mahādevyaḥ
Vocative	mahādevi	mahādevyau	mahādevyaḥ
Accusative	mahādevīm	mahādevyau	mahādevīḥ
Instrumental	mahādevyā	mahādevībhyām	mahādevībhiḥ
Dative	mahādevyai	mahādevībhyām	mahādevībhyaḥ
Ablative	mahādevyāḥ	mahādevībhyām	mahādevībhyaḥ
Genitive	mahādevyāḥ	mahādevyoḥ	mahādevīnām
Locative	mahādevyām	mahādevyoḥ	mahādevīṣu

Compound mahādevi - mahādevī -

Adverb -mahādevi