Declension table of ?bhantavat

Masculine	Singular	Dual	Plural
Nominative	bhantavān	bhantavantau	bhantavantaḥ
Vocative	bhantavan	bhantavantau	bhantavantaḥ
Accusative	bhantavantam	bhantavantau	bhantavataḥ
Instrumental	bhantavatā	bhantavadbhyām	bhantavadbhiḥ
Dative	bhantavate	bhantavadbhyām	bhantavadbhyaḥ
Ablative	bhantavataḥ	bhantavadbhyām	bhantavadbhyaḥ
Genitive	bhantavataḥ	bhantavatoḥ	bhantavatām
Locative	bhantavati	bhantavatoḥ	bhantavatsu

Compound bhantavat -

Adverb -bhantavantam