Declension table of viśvakāya

Masculine	Singular	Dual	Plural
Nominative	viśvakāyaḥ	viśvakāyau	viśvakāyāḥ
Vocative	viśvakāya	viśvakāyau	viśvakāyāḥ
Accusative	viśvakāyam	viśvakāyau	viśvakāyān
Instrumental	viśvakāyena	viśvakāyābhyām	viśvakāyaiḥ
Dative	viśvakāyāya	viśvakāyābhyām	viśvakāyebhyaḥ
Ablative	viśvakāyāt	viśvakāyābhyām	viśvakāyebhyaḥ
Genitive	viśvakāyasya	viśvakāyayoḥ	viśvakāyānām
Locative	viśvakāye	viśvakāyayoḥ	viśvakāyeṣu

Compound viśvakāya -

Adverb -viśvakāyam -viśvakāyāt