Declension table of ?vismayana

Neuter	Singular	Dual	Plural
Nominative	vismayanam	vismayane	vismayanāni
Vocative	vismayana	vismayane	vismayanāni
Accusative	vismayanam	vismayane	vismayanāni
Instrumental	vismayanena	vismayanābhyām	vismayanaiḥ
Dative	vismayanāya	vismayanābhyām	vismayanebhyaḥ
Ablative	vismayanāt	vismayanābhyām	vismayanebhyaḥ
Genitive	vismayanasya	vismayanayoḥ	vismayanānām
Locative	vismayane	vismayanayoḥ	vismayaneṣu

Compound vismayana -

Adverb -vismayanam -vismayanāt