Declension table of ?dura

Masculine	Singular	Dual	Plural
Nominative	duraḥ	durau	durāḥ
Vocative	dura	durau	durāḥ
Accusative	duram	durau	durān
Instrumental	dureṇa	durābhyām	duraiḥ durebhiḥ
Dative	durāya	durābhyām	durebhyaḥ
Ablative	durāt	durābhyām	durebhyaḥ
Genitive	durasya	durayoḥ	durāṇām
Locative	dure	durayoḥ	dureṣu

Compound dura -

Adverb -duram -durāt