Declension table of ?viśvaka

Masculine	Singular	Dual	Plural
Nominative	viśvakaḥ	viśvakau	viśvakāḥ
Vocative	viśvaka	viśvakau	viśvakāḥ
Accusative	viśvakam	viśvakau	viśvakān
Instrumental	viśvakena	viśvakābhyām	viśvakaiḥ viśvakebhiḥ
Dative	viśvakāya	viśvakābhyām	viśvakebhyaḥ
Ablative	viśvakāt	viśvakābhyām	viśvakebhyaḥ
Genitive	viśvakasya	viśvakayoḥ	viśvakānām
Locative	viśvake	viśvakayoḥ	viśvakeṣu

Compound viśvaka -

Adverb -viśvakam -viśvakāt