Declension table of ?vastvabhāva

Masculine	Singular	Dual	Plural
Nominative	vastvabhāvaḥ	vastvabhāvau	vastvabhāvāḥ
Vocative	vastvabhāva	vastvabhāvau	vastvabhāvāḥ
Accusative	vastvabhāvam	vastvabhāvau	vastvabhāvān
Instrumental	vastvabhāvena	vastvabhāvābhyām	vastvabhāvaiḥ vastvabhāvebhiḥ
Dative	vastvabhāvāya	vastvabhāvābhyām	vastvabhāvebhyaḥ
Ablative	vastvabhāvāt	vastvabhāvābhyām	vastvabhāvebhyaḥ
Genitive	vastvabhāvasya	vastvabhāvayoḥ	vastvabhāvānām
Locative	vastvabhāve	vastvabhāvayoḥ	vastvabhāveṣu

Compound vastvabhāva -

Adverb -vastvabhāvam -vastvabhāvāt