Declension table of ?viśvakāya

Neuter	Singular	Dual	Plural
Nominative	viśvakāyam	viśvakāye	viśvakāyāni
Vocative	viśvakāya	viśvakāye	viśvakāyāni
Accusative	viśvakāyam	viśvakāye	viśvakāyāni
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