Declension table of mahāvrata

Neuter	Singular	Dual	Plural
Nominative	mahāvratam	mahāvrate	mahāvratāni
Vocative	mahāvrata	mahāvrate	mahāvratāni
Accusative	mahāvratam	mahāvrate	mahāvratāni
Instrumental	mahāvratena	mahāvratābhyām	mahāvrataiḥ
Dative	mahāvratāya	mahāvratābhyām	mahāvratebhyaḥ
Ablative	mahāvratāt	mahāvratābhyām	mahāvratebhyaḥ
Genitive	mahāvratasya	mahāvratayoḥ	mahāvratānām
Locative	mahāvrate	mahāvratayoḥ	mahāvrateṣu

Compound mahāvrata -

Adverb -mahāvratam -mahāvratāt