Declension table of ?dvādaśama

Neuter	Singular	Dual	Plural
Nominative	dvādaśamam	dvādaśame	dvādaśamāni
Vocative	dvādaśama	dvādaśame	dvādaśamāni
Accusative	dvādaśamam	dvādaśame	dvādaśamāni
Instrumental	dvādaśamena	dvādaśamābhyām	dvādaśamaiḥ
Dative	dvādaśamāya	dvādaśamābhyām	dvādaśamebhyaḥ
Ablative	dvādaśamāt	dvādaśamābhyām	dvādaśamebhyaḥ
Genitive	dvādaśamasya	dvādaśamayoḥ	dvādaśamānām
Locative	dvādaśame	dvādaśamayoḥ	dvādaśameṣu

Compound dvādaśama -

Adverb -dvādaśamam -dvādaśamāt