Declension table of ?viśvasāra

Neuter	Singular	Dual	Plural
Nominative	viśvasāram	viśvasāre	viśvasārāṇi
Vocative	viśvasāra	viśvasāre	viśvasārāṇi
Accusative	viśvasāram	viśvasāre	viśvasārāṇi
Instrumental	viśvasāreṇa	viśvasārābhyām	viśvasāraiḥ
Dative	viśvasārāya	viśvasārābhyām	viśvasārebhyaḥ
Ablative	viśvasārāt	viśvasārābhyām	viśvasārebhyaḥ
Genitive	viśvasārasya	viśvasārayoḥ	viśvasārāṇām
Locative	viśvasāre	viśvasārayoḥ	viśvasāreṣu

Compound viśvasāra -

Adverb -viśvasāram -viśvasārāt