Declension table of upanaya

Masculine	Singular	Dual	Plural
Nominative	upanayaḥ	upanayau	upanayāḥ
Vocative	upanaya	upanayau	upanayāḥ
Accusative	upanayam	upanayau	upanayān
Instrumental	upanayena	upanayābhyām	upanayaiḥ upanayebhiḥ
Dative	upanayāya	upanayābhyām	upanayebhyaḥ
Ablative	upanayāt	upanayābhyām	upanayebhyaḥ
Genitive	upanayasya	upanayayoḥ	upanayānām
Locative	upanaye	upanayayoḥ	upanayeṣu

Compound upanaya -

Adverb -upanayam -upanayāt