Declension table of ?dvādaśanidhana

Neuter	Singular	Dual	Plural
Nominative	dvādaśanidhanam	dvādaśanidhane	dvādaśanidhanāni
Vocative	dvādaśanidhana	dvādaśanidhane	dvādaśanidhanāni
Accusative	dvādaśanidhanam	dvādaśanidhane	dvādaśanidhanāni
Instrumental	dvādaśanidhanena	dvādaśanidhanābhyām	dvādaśanidhanaiḥ
Dative	dvādaśanidhanāya	dvādaśanidhanābhyām	dvādaśanidhanebhyaḥ
Ablative	dvādaśanidhanāt	dvādaśanidhanābhyām	dvādaśanidhanebhyaḥ
Genitive	dvādaśanidhanasya	dvādaśanidhanayoḥ	dvādaśanidhanānām
Locative	dvādaśanidhane	dvādaśanidhanayoḥ	dvādaśanidhaneṣu

Compound dvādaśanidhana -

Adverb -dvādaśanidhanam -dvādaśanidhanāt