Declension table of ?vimāna

Neuter	Singular	Dual	Plural
Nominative	vimānam	vimāne	vimānāni
Vocative	vimāna	vimāne	vimānāni
Accusative	vimānam	vimāne	vimānāni
Instrumental	vimānena	vimānābhyām	vimānaiḥ
Dative	vimānāya	vimānābhyām	vimānebhyaḥ
Ablative	vimānāt	vimānābhyām	vimānebhyaḥ
Genitive	vimānasya	vimānayoḥ	vimānānām
Locative	vimāne	vimānayoḥ	vimāneṣu

Compound vimāna -

Adverb -vimānam -vimānāt