Declension table of ?mahādruma

Masculine	Singular	Dual	Plural
Nominative	mahādrumaḥ	mahādrumau	mahādrumāḥ
Vocative	mahādruma	mahādrumau	mahādrumāḥ
Accusative	mahādrumam	mahādrumau	mahādrumān
Instrumental	mahādrumeṇa	mahādrumābhyām	mahādrumaiḥ mahādrumebhiḥ
Dative	mahādrumāya	mahādrumābhyām	mahādrumebhyaḥ
Ablative	mahādrumāt	mahādrumābhyām	mahādrumebhyaḥ
Genitive	mahādrumasya	mahādrumayoḥ	mahādrumāṇām
Locative	mahādrume	mahādrumayoḥ	mahādrumeṣu

Compound mahādruma -

Adverb -mahādrumam -mahādrumāt