Declension table of ratnakośa

Masculine	Singular	Dual	Plural
Nominative	ratnakośaḥ	ratnakośau	ratnakośāḥ
Vocative	ratnakośa	ratnakośau	ratnakośāḥ
Accusative	ratnakośam	ratnakośau	ratnakośān
Instrumental	ratnakośena	ratnakośābhyām	ratnakośaiḥ
Dative	ratnakośāya	ratnakośābhyām	ratnakośebhyaḥ
Ablative	ratnakośāt	ratnakośābhyām	ratnakośebhyaḥ
Genitive	ratnakośasya	ratnakośayoḥ	ratnakośānām
Locative	ratnakośe	ratnakośayoḥ	ratnakośeṣu

Compound ratnakośa -

Adverb -ratnakośam -ratnakośāt