Declension table of maraṇatva

Neuter	Singular	Dual	Plural
Nominative	maraṇatvam	maraṇatve	maraṇatvāni
Vocative	maraṇatva	maraṇatve	maraṇatvāni
Accusative	maraṇatvam	maraṇatve	maraṇatvāni
Instrumental	maraṇatvena	maraṇatvābhyām	maraṇatvaiḥ
Dative	maraṇatvāya	maraṇatvābhyām	maraṇatvebhyaḥ
Ablative	maraṇatvāt	maraṇatvābhyām	maraṇatvebhyaḥ
Genitive	maraṇatvasya	maraṇatvayoḥ	maraṇatvānām
Locative	maraṇatve	maraṇatvayoḥ	maraṇatveṣu

Compound maraṇatva -

Adverb -maraṇatvam -maraṇatvāt