Declension table of ?vipavana

Neuter	Singular	Dual	Plural
Nominative	vipavanam	vipavane	vipavanāni
Vocative	vipavana	vipavane	vipavanāni
Accusative	vipavanam	vipavane	vipavanāni
Instrumental	vipavanena	vipavanābhyām	vipavanaiḥ
Dative	vipavanāya	vipavanābhyām	vipavanebhyaḥ
Ablative	vipavanāt	vipavanābhyām	vipavanebhyaḥ
Genitive	vipavanasya	vipavanayoḥ	vipavanānām
Locative	vipavane	vipavanayoḥ	vipavaneṣu

Compound vipavana -

Adverb -vipavanam -vipavanāt