Declension table of ?ṛṣisvara

Neuter	Singular	Dual	Plural
Nominative	ṛṣisvaram	ṛṣisvare	ṛṣisvarāṇi
Vocative	ṛṣisvara	ṛṣisvare	ṛṣisvarāṇi
Accusative	ṛṣisvaram	ṛṣisvare	ṛṣisvarāṇi
Instrumental	ṛṣisvareṇa	ṛṣisvarābhyām	ṛṣisvaraiḥ
Dative	ṛṣisvarāya	ṛṣisvarābhyām	ṛṣisvarebhyaḥ
Ablative	ṛṣisvarāt	ṛṣisvarābhyām	ṛṣisvarebhyaḥ
Genitive	ṛṣisvarasya	ṛṣisvarayoḥ	ṛṣisvarāṇām
Locative	ṛṣisvare	ṛṣisvarayoḥ	ṛṣisvareṣu

Compound ṛṣisvara -

Adverb -ṛṣisvaram -ṛṣisvarāt