Declension table of ?ekādaśin

Neuter	Singular	Dual	Plural
Nominative	ekādaśi	ekādaśinī	ekādaśīni
Vocative	ekādaśin ekādaśi	ekādaśinī	ekādaśīni
Accusative	ekādaśi	ekādaśinī	ekādaśīni
Instrumental	ekādaśinā	ekādaśibhyām	ekādaśibhiḥ
Dative	ekādaśine	ekādaśibhyām	ekādaśibhyaḥ
Ablative	ekādaśinaḥ	ekādaśibhyām	ekādaśibhyaḥ
Genitive	ekādaśinaḥ	ekādaśinoḥ	ekādaśinām
Locative	ekādaśini	ekādaśinoḥ	ekādaśiṣu

Compound ekādaśi -

Adverb -ekādaśi