Declension table of ?vismayavat

Masculine	Singular	Dual	Plural
Nominative	vismayavān	vismayavantau	vismayavantaḥ
Vocative	vismayavan	vismayavantau	vismayavantaḥ
Accusative	vismayavantam	vismayavantau	vismayavataḥ
Instrumental	vismayavatā	vismayavadbhyām	vismayavadbhiḥ
Dative	vismayavate	vismayavadbhyām	vismayavadbhyaḥ
Ablative	vismayavataḥ	vismayavadbhyām	vismayavadbhyaḥ
Genitive	vismayavataḥ	vismayavatoḥ	vismayavatām
Locative	vismayavati	vismayavatoḥ	vismayavatsu

Compound vismayavat -

Adverb -vismayavantam