Declension table of ?rāvaṇahasra

Masculine	Singular	Dual	Plural
Nominative	rāvaṇahasraḥ	rāvaṇahasrau	rāvaṇahasrāḥ
Vocative	rāvaṇahasra	rāvaṇahasrau	rāvaṇahasrāḥ
Accusative	rāvaṇahasram	rāvaṇahasrau	rāvaṇahasrān
Instrumental	rāvaṇahasreṇa	rāvaṇahasrābhyām	rāvaṇahasraiḥ rāvaṇahasrebhiḥ
Dative	rāvaṇahasrāya	rāvaṇahasrābhyām	rāvaṇahasrebhyaḥ
Ablative	rāvaṇahasrāt	rāvaṇahasrābhyām	rāvaṇahasrebhyaḥ
Genitive	rāvaṇahasrasya	rāvaṇahasrayoḥ	rāvaṇahasrāṇām
Locative	rāvaṇahasre	rāvaṇahasrayoḥ	rāvaṇahasreṣu

Compound rāvaṇahasra -

Adverb -rāvaṇahasram -rāvaṇahasrāt