Declension table of ?vayasa

Masculine	Singular	Dual	Plural
Nominative	vayasaḥ	vayasau	vayasāḥ
Vocative	vayasa	vayasau	vayasāḥ
Accusative	vayasam	vayasau	vayasān
Instrumental	vayasena	vayasābhyām	vayasaiḥ vayasebhiḥ
Dative	vayasāya	vayasābhyām	vayasebhyaḥ
Ablative	vayasāt	vayasābhyām	vayasebhyaḥ
Genitive	vayasasya	vayasayoḥ	vayasānām
Locative	vayase	vayasayoḥ	vayaseṣu

Compound vayasa -

Adverb -vayasam -vayasāt