Declension table of ?nirnidra

Masculine	Singular	Dual	Plural
Nominative	nirnidraḥ	nirnidrau	nirnidrāḥ
Vocative	nirnidra	nirnidrau	nirnidrāḥ
Accusative	nirnidram	nirnidrau	nirnidrān
Instrumental	nirnidreṇa	nirnidrābhyām	nirnidraiḥ nirnidrebhiḥ
Dative	nirnidrāya	nirnidrābhyām	nirnidrebhyaḥ
Ablative	nirnidrāt	nirnidrābhyām	nirnidrebhyaḥ
Genitive	nirnidrasya	nirnidrayoḥ	nirnidrāṇām
Locative	nirnidre	nirnidrayoḥ	nirnidreṣu

Compound nirnidra -

Adverb -nirnidram -nirnidrāt