Declension table of ?kāyavat

Masculine	Singular	Dual	Plural
Nominative	kāyavān	kāyavantau	kāyavantaḥ
Vocative	kāyavan	kāyavantau	kāyavantaḥ
Accusative	kāyavantam	kāyavantau	kāyavataḥ
Instrumental	kāyavatā	kāyavadbhyām	kāyavadbhiḥ
Dative	kāyavate	kāyavadbhyām	kāyavadbhyaḥ
Ablative	kāyavataḥ	kāyavadbhyām	kāyavadbhyaḥ
Genitive	kāyavataḥ	kāyavatoḥ	kāyavatām
Locative	kāyavati	kāyavatoḥ	kāyavatsu

Compound kāyavat -

Adverb -kāyavantam