Declension table of ?mahāstoma

Masculine	Singular	Dual	Plural
Nominative	mahāstomaḥ	mahāstomau	mahāstomāḥ
Vocative	mahāstoma	mahāstomau	mahāstomāḥ
Accusative	mahāstomam	mahāstomau	mahāstomān
Instrumental	mahāstomena	mahāstomābhyām	mahāstomaiḥ mahāstomebhiḥ
Dative	mahāstomāya	mahāstomābhyām	mahāstomebhyaḥ
Ablative	mahāstomāt	mahāstomābhyām	mahāstomebhyaḥ
Genitive	mahāstomasya	mahāstomayoḥ	mahāstomānām
Locative	mahāstome	mahāstomayoḥ	mahāstomeṣu

Compound mahāstoma -

Adverb -mahāstomam -mahāstomāt