Declension table of ?vṛtraha

Masculine	Singular	Dual	Plural
Nominative	vṛtrahaḥ	vṛtrahau	vṛtrahāḥ
Vocative	vṛtraha	vṛtrahau	vṛtrahāḥ
Accusative	vṛtraham	vṛtrahau	vṛtrahān
Instrumental	vṛtraheṇa	vṛtrahābhyām	vṛtrahaiḥ vṛtrahebhiḥ
Dative	vṛtrahāya	vṛtrahābhyām	vṛtrahebhyaḥ
Ablative	vṛtrahāt	vṛtrahābhyām	vṛtrahebhyaḥ
Genitive	vṛtrahasya	vṛtrahayoḥ	vṛtrahāṇām
Locative	vṛtrahe	vṛtrahayoḥ	vṛtraheṣu

Compound vṛtraha -

Adverb -vṛtraham -vṛtrahāt