Declension table of ?vivilvas

Masculine	Singular	Dual	Plural
Nominative	vivilvān	vivilvāṃsau	vivilvāṃsaḥ
Vocative	vivilvan	vivilvāṃsau	vivilvāṃsaḥ
Accusative	vivilvāṃsam	vivilvāṃsau	viviluṣaḥ
Instrumental	viviluṣā	vivilvadbhyām	vivilvadbhiḥ
Dative	viviluṣe	vivilvadbhyām	vivilvadbhyaḥ
Ablative	viviluṣaḥ	vivilvadbhyām	vivilvadbhyaḥ
Genitive	viviluṣaḥ	viviluṣoḥ	viviluṣām
Locative	viviluṣi	viviluṣoḥ	vivilvatsu

Compound vivilvat -

Adverb -vivilvas