Declension table of ?viśvantara

Masculine	Singular	Dual	Plural
Nominative	viśvantaraḥ	viśvantarau	viśvantarāḥ
Vocative	viśvantara	viśvantarau	viśvantarāḥ
Accusative	viśvantaram	viśvantarau	viśvantarān
Instrumental	viśvantareṇa	viśvantarābhyām	viśvantaraiḥ viśvantarebhiḥ
Dative	viśvantarāya	viśvantarābhyām	viśvantarebhyaḥ
Ablative	viśvantarāt	viśvantarābhyām	viśvantarebhyaḥ
Genitive	viśvantarasya	viśvantarayoḥ	viśvantarāṇām
Locative	viśvantare	viśvantarayoḥ	viśvantareṣu

Compound viśvantara -

Adverb -viśvantaram -viśvantarāt