Declension table of ?sopacaya

Neuter	Singular	Dual	Plural
Nominative	sopacayam	sopacaye	sopacayāni
Vocative	sopacaya	sopacaye	sopacayāni
Accusative	sopacayam	sopacaye	sopacayāni
Instrumental	sopacayena	sopacayābhyām	sopacayaiḥ
Dative	sopacayāya	sopacayābhyām	sopacayebhyaḥ
Ablative	sopacayāt	sopacayābhyām	sopacayebhyaḥ
Genitive	sopacayasya	sopacayayoḥ	sopacayānām
Locative	sopacaye	sopacayayoḥ	sopacayeṣu

Compound sopacaya -

Adverb -sopacayam -sopacayāt