Declension table of ?vayas

Neuter	Singular	Dual	Plural
Nominative	vayaḥ	vayasī	vayāṃsi
Vocative	vayaḥ	vayasī	vayāṃsi
Accusative	vayaḥ	vayasī	vayāṃsi
Instrumental	vayasā	vayobhyām	vayobhiḥ
Dative	vayase	vayobhyām	vayobhyaḥ
Ablative	vayasaḥ	vayobhyām	vayobhyaḥ
Genitive	vayasaḥ	vayasoḥ	vayasām
Locative	vayasi	vayasoḥ	vayaḥsu

Compound vayas -

Adverb -vayas