Declension table of ?naśvaratva

Neuter	Singular	Dual	Plural
Nominative	naśvaratvam	naśvaratve	naśvaratvāni
Vocative	naśvaratva	naśvaratve	naśvaratvāni
Accusative	naśvaratvam	naśvaratve	naśvaratvāni
Instrumental	naśvaratvena	naśvaratvābhyām	naśvaratvaiḥ
Dative	naśvaratvāya	naśvaratvābhyām	naśvaratvebhyaḥ
Ablative	naśvaratvāt	naśvaratvābhyām	naśvaratvebhyaḥ
Genitive	naśvaratvasya	naśvaratvayoḥ	naśvaratvānām
Locative	naśvaratve	naśvaratvayoḥ	naśvaratveṣu

Compound naśvaratva -

Adverb -naśvaratvam -naśvaratvāt