Declension table of ?karapattra

Neuter	Singular	Dual	Plural
Nominative	karapattram	karapattre	karapattrāṇi
Vocative	karapattra	karapattre	karapattrāṇi
Accusative	karapattram	karapattre	karapattrāṇi
Instrumental	karapattreṇa	karapattrābhyām	karapattraiḥ
Dative	karapattrāya	karapattrābhyām	karapattrebhyaḥ
Ablative	karapattrāt	karapattrābhyām	karapattrebhyaḥ
Genitive	karapattrasya	karapattrayoḥ	karapattrāṇām
Locative	karapattre	karapattrayoḥ	karapattreṣu

Compound karapattra -

Adverb -karapattram -karapattrāt