Declension table of ?mahākāya

Masculine	Singular	Dual	Plural
Nominative	mahākāyaḥ	mahākāyau	mahākāyāḥ
Vocative	mahākāya	mahākāyau	mahākāyāḥ
Accusative	mahākāyam	mahākāyau	mahākāyān
Instrumental	mahākāyena	mahākāyābhyām	mahākāyaiḥ mahākāyebhiḥ
Dative	mahākāyāya	mahākāyābhyām	mahākāyebhyaḥ
Ablative	mahākāyāt	mahākāyābhyām	mahākāyebhyaḥ
Genitive	mahākāyasya	mahākāyayoḥ	mahākāyānām
Locative	mahākāye	mahākāyayoḥ	mahākāyeṣu

Compound mahākāya -

Adverb -mahākāyam -mahākāyāt