Declension table of ?sopādhika

Neuter	Singular	Dual	Plural
Nominative	sopādhikam	sopādhike	sopādhikāni
Vocative	sopādhika	sopādhike	sopādhikāni
Accusative	sopādhikam	sopādhike	sopādhikāni
Instrumental	sopādhikena	sopādhikābhyām	sopādhikaiḥ
Dative	sopādhikāya	sopādhikābhyām	sopādhikebhyaḥ
Ablative	sopādhikāt	sopādhikābhyām	sopādhikebhyaḥ
Genitive	sopādhikasya	sopādhikayoḥ	sopādhikānām
Locative	sopādhike	sopādhikayoḥ	sopādhikeṣu

Compound sopādhika -

Adverb -sopādhikam -sopādhikāt