Declension table of ?vṛṣṭavat

Masculine	Singular	Dual	Plural
Nominative	vṛṣṭavān	vṛṣṭavantau	vṛṣṭavantaḥ
Vocative	vṛṣṭavan	vṛṣṭavantau	vṛṣṭavantaḥ
Accusative	vṛṣṭavantam	vṛṣṭavantau	vṛṣṭavataḥ
Instrumental	vṛṣṭavatā	vṛṣṭavadbhyām	vṛṣṭavadbhiḥ
Dative	vṛṣṭavate	vṛṣṭavadbhyām	vṛṣṭavadbhyaḥ
Ablative	vṛṣṭavataḥ	vṛṣṭavadbhyām	vṛṣṭavadbhyaḥ
Genitive	vṛṣṭavataḥ	vṛṣṭavatoḥ	vṛṣṭavatām
Locative	vṛṣṭavati	vṛṣṭavatoḥ	vṛṣṭavatsu

Compound vṛṣṭavat -

Adverb -vṛṣṭavantam