Declension table of ?brahmāstrakavaca

Masculine	Singular	Dual	Plural
Nominative	brahmāstrakavacaḥ	brahmāstrakavacau	brahmāstrakavacāḥ
Vocative	brahmāstrakavaca	brahmāstrakavacau	brahmāstrakavacāḥ
Accusative	brahmāstrakavacam	brahmāstrakavacau	brahmāstrakavacān
Instrumental	brahmāstrakavacena	brahmāstrakavacābhyām	brahmāstrakavacaiḥ brahmāstrakavacebhiḥ
Dative	brahmāstrakavacāya	brahmāstrakavacābhyām	brahmāstrakavacebhyaḥ
Ablative	brahmāstrakavacāt	brahmāstrakavacābhyām	brahmāstrakavacebhyaḥ
Genitive	brahmāstrakavacasya	brahmāstrakavacayoḥ	brahmāstrakavacānām
Locative	brahmāstrakavace	brahmāstrakavacayoḥ	brahmāstrakavaceṣu

Compound brahmāstrakavaca -

Adverb -brahmāstrakavacam -brahmāstrakavacāt