Declension table of vajra

Masculine	Singular	Dual	Plural
Nominative	vajraḥ	vajrau	vajrāḥ
Vocative	vajra	vajrau	vajrāḥ
Accusative	vajram	vajrau	vajrān
Instrumental	vajreṇa	vajrābhyām	vajraiḥ vajrebhiḥ
Dative	vajrāya	vajrābhyām	vajrebhyaḥ
Ablative	vajrāt	vajrābhyām	vajrebhyaḥ
Genitive	vajrasya	vajrayoḥ	vajrāṇām
Locative	vajre	vajrayoḥ	vajreṣu

Compound vajra -

Adverb -vajram -vajrāt