Declension table of ?pratyadana

Neuter	Singular	Dual	Plural
Nominative	pratyadanam	pratyadane	pratyadanāni
Vocative	pratyadana	pratyadane	pratyadanāni
Accusative	pratyadanam	pratyadane	pratyadanāni
Instrumental	pratyadanena	pratyadanābhyām	pratyadanaiḥ
Dative	pratyadanāya	pratyadanābhyām	pratyadanebhyaḥ
Ablative	pratyadanāt	pratyadanābhyām	pratyadanebhyaḥ
Genitive	pratyadanasya	pratyadanayoḥ	pratyadanānām
Locative	pratyadane	pratyadanayoḥ	pratyadaneṣu

Compound pratyadana -

Adverb -pratyadanam -pratyadanāt