Declension table of ?vihara

Masculine	Singular	Dual	Plural
Nominative	viharaḥ	viharau	viharāḥ
Vocative	vihara	viharau	viharāḥ
Accusative	viharam	viharau	viharān
Instrumental	vihareṇa	viharābhyām	viharaiḥ viharebhiḥ
Dative	viharāya	viharābhyām	viharebhyaḥ
Ablative	viharāt	viharābhyām	viharebhyaḥ
Genitive	viharasya	viharayoḥ	viharāṇām
Locative	vihare	viharayoḥ	vihareṣu

Compound vihara -

Adverb -viharam -viharāt