Declension table of ?vastubhāva

Masculine	Singular	Dual	Plural
Nominative	vastubhāvaḥ	vastubhāvau	vastubhāvāḥ
Vocative	vastubhāva	vastubhāvau	vastubhāvāḥ
Accusative	vastubhāvam	vastubhāvau	vastubhāvān
Instrumental	vastubhāvena	vastubhāvābhyām	vastubhāvaiḥ vastubhāvebhiḥ
Dative	vastubhāvāya	vastubhāvābhyām	vastubhāvebhyaḥ
Ablative	vastubhāvāt	vastubhāvābhyām	vastubhāvebhyaḥ
Genitive	vastubhāvasya	vastubhāvayoḥ	vastubhāvānām
Locative	vastubhāve	vastubhāvayoḥ	vastubhāveṣu

Compound vastubhāva -

Adverb -vastubhāvam -vastubhāvāt