Declension table of ?bhairavatva

Neuter	Singular	Dual	Plural
Nominative	bhairavatvam	bhairavatve	bhairavatvāni
Vocative	bhairavatva	bhairavatve	bhairavatvāni
Accusative	bhairavatvam	bhairavatve	bhairavatvāni
Instrumental	bhairavatvena	bhairavatvābhyām	bhairavatvaiḥ
Dative	bhairavatvāya	bhairavatvābhyām	bhairavatvebhyaḥ
Ablative	bhairavatvāt	bhairavatvābhyām	bhairavatvebhyaḥ
Genitive	bhairavatvasya	bhairavatvayoḥ	bhairavatvānām
Locative	bhairavatve	bhairavatvayoḥ	bhairavatveṣu

Compound bhairavatva -

Adverb -bhairavatvam -bhairavatvāt