Declension table of ?upacaya

Masculine	Singular	Dual	Plural
Nominative	upacayaḥ	upacayau	upacayāḥ
Vocative	upacaya	upacayau	upacayāḥ
Accusative	upacayam	upacayau	upacayān
Instrumental	upacayena	upacayābhyām	upacayaiḥ upacayebhiḥ
Dative	upacayāya	upacayābhyām	upacayebhyaḥ
Ablative	upacayāt	upacayābhyām	upacayebhyaḥ
Genitive	upacayasya	upacayayoḥ	upacayānām
Locative	upacaye	upacayayoḥ	upacayeṣu

Compound upacaya -

Adverb -upacayam -upacayāt