Declension table of vistara

Neuter	Singular	Dual	Plural
Nominative	vistaram	vistare	vistarāṇi
Vocative	vistara	vistare	vistarāṇi
Accusative	vistaram	vistare	vistarāṇi
Instrumental	vistareṇa	vistarābhyām	vistaraiḥ
Dative	vistarāya	vistarābhyām	vistarebhyaḥ
Ablative	vistarāt	vistarābhyām	vistarebhyaḥ
Genitive	vistarasya	vistarayoḥ	vistarāṇām
Locative	vistare	vistarayoḥ	vistareṣu

Compound vistara -

Adverb -vistaram -vistarāt