Declension table of ?avataṃsana

Neuter	Singular	Dual	Plural
Nominative	avataṃsanam	avataṃsane	avataṃsanāni
Vocative	avataṃsana	avataṃsane	avataṃsanāni
Accusative	avataṃsanam	avataṃsane	avataṃsanāni
Instrumental	avataṃsanena	avataṃsanābhyām	avataṃsanaiḥ
Dative	avataṃsanāya	avataṃsanābhyām	avataṃsanebhyaḥ
Ablative	avataṃsanāt	avataṃsanābhyām	avataṃsanebhyaḥ
Genitive	avataṃsanasya	avataṃsanayoḥ	avataṃsanānām
Locative	avataṃsane	avataṃsanayoḥ	avataṃsaneṣu

Compound avataṃsana -

Adverb -avataṃsanam -avataṃsanāt