Declension table of ?saustra

Neuter	Singular	Dual	Plural
Nominative	saustram	saustre	saustrāṇi
Vocative	saustra	saustre	saustrāṇi
Accusative	saustram	saustre	saustrāṇi
Instrumental	saustreṇa	saustrābhyām	saustraiḥ
Dative	saustrāya	saustrābhyām	saustrebhyaḥ
Ablative	saustrāt	saustrābhyām	saustrebhyaḥ
Genitive	saustrasya	saustrayoḥ	saustrāṇām
Locative	saustre	saustrayoḥ	saustreṣu

Compound saustra -

Adverb -saustram -saustrāt