Declension table of ?aśvatva

Neuter	Singular	Dual	Plural
Nominative	aśvatvam	aśvatve	aśvatvāni
Vocative	aśvatva	aśvatve	aśvatvāni
Accusative	aśvatvam	aśvatve	aśvatvāni
Instrumental	aśvatvena	aśvatvābhyām	aśvatvaiḥ
Dative	aśvatvāya	aśvatvābhyām	aśvatvebhyaḥ
Ablative	aśvatvāt	aśvatvābhyām	aśvatvebhyaḥ
Genitive	aśvatvasya	aśvatvayoḥ	aśvatvānām
Locative	aśvatve	aśvatvayoḥ	aśvatveṣu

Compound aśvatva -

Adverb -aśvatvam -aśvatvāt