Declension table of kavacamantra

Neuter	Singular	Dual	Plural
Nominative	kavacamantram	kavacamantre	kavacamantrāṇi
Vocative	kavacamantra	kavacamantre	kavacamantrāṇi
Accusative	kavacamantram	kavacamantre	kavacamantrāṇi
Instrumental	kavacamantreṇa	kavacamantrābhyām	kavacamantraiḥ
Dative	kavacamantrāya	kavacamantrābhyām	kavacamantrebhyaḥ
Ablative	kavacamantrāt	kavacamantrābhyām	kavacamantrebhyaḥ
Genitive	kavacamantrasya	kavacamantrayoḥ	kavacamantrāṇām
Locative	kavacamantre	kavacamantrayoḥ	kavacamantreṣu

Compound kavacamantra -

Adverb -kavacamantram -kavacamantrāt