Declension table of ?vṛtraha

Neuter	Singular	Dual	Plural
Nominative	vṛtraham	vṛtrahe	vṛtrahāṇi
Vocative	vṛtraha	vṛtrahe	vṛtrahāṇi
Accusative	vṛtraham	vṛtrahe	vṛtrahāṇi
Instrumental	vṛtraheṇa	vṛtrahābhyām	vṛtrahaiḥ
Dative	vṛtrahāya	vṛtrahābhyām	vṛtrahebhyaḥ
Ablative	vṛtrahāt	vṛtrahābhyām	vṛtrahebhyaḥ
Genitive	vṛtrahasya	vṛtrahayoḥ	vṛtrahāṇām
Locative	vṛtrahe	vṛtrahayoḥ	vṛtraheṣu

Compound vṛtraha -

Adverb -vṛtraham -vṛtrahāt