Declension table of ?mahātapa

Neuter	Singular	Dual	Plural
Nominative	mahātapam	mahātape	mahātapāni
Vocative	mahātapa	mahātape	mahātapāni
Accusative	mahātapam	mahātape	mahātapāni
Instrumental	mahātapena	mahātapābhyām	mahātapaiḥ
Dative	mahātapāya	mahātapābhyām	mahātapebhyaḥ
Ablative	mahātapāt	mahātapābhyām	mahātapebhyaḥ
Genitive	mahātapasya	mahātapayoḥ	mahātapānām
Locative	mahātape	mahātapayoḥ	mahātapeṣu

Compound mahātapa -

Adverb -mahātapam -mahātapāt