Declension table of ?vacanāvat

Masculine	Singular	Dual	Plural
Nominative	vacanāvān	vacanāvantau	vacanāvantaḥ
Vocative	vacanāvan	vacanāvantau	vacanāvantaḥ
Accusative	vacanāvantam	vacanāvantau	vacanāvataḥ
Instrumental	vacanāvatā	vacanāvadbhyām	vacanāvadbhiḥ
Dative	vacanāvate	vacanāvadbhyām	vacanāvadbhyaḥ
Ablative	vacanāvataḥ	vacanāvadbhyām	vacanāvadbhyaḥ
Genitive	vacanāvataḥ	vacanāvatoḥ	vacanāvatām
Locative	vacanāvati	vacanāvatoḥ	vacanāvatsu

Compound vacanāvat -

Adverb -vacanāvantam