Declension table of ?mahāstoma

Neuter	Singular	Dual	Plural
Nominative	mahāstomam	mahāstome	mahāstomāni
Vocative	mahāstoma	mahāstome	mahāstomāni
Accusative	mahāstomam	mahāstome	mahāstomāni
Instrumental	mahāstomena	mahāstomābhyām	mahāstomaiḥ
Dative	mahāstomāya	mahāstomābhyām	mahāstomebhyaḥ
Ablative	mahāstomāt	mahāstomābhyām	mahāstomebhyaḥ
Genitive	mahāstomasya	mahāstomayoḥ	mahāstomānām
Locative	mahāstome	mahāstomayoḥ	mahāstomeṣu

Compound mahāstoma -

Adverb -mahāstomam -mahāstomāt