Declension table of ?vacasa

Neuter	Singular	Dual	Plural
Nominative	vacasam	vacase	vacasāni
Vocative	vacasa	vacase	vacasāni
Accusative	vacasam	vacase	vacasāni
Instrumental	vacasena	vacasābhyām	vacasaiḥ
Dative	vacasāya	vacasābhyām	vacasebhyaḥ
Ablative	vacasāt	vacasābhyām	vacasebhyaḥ
Genitive	vacasasya	vacasayoḥ	vacasānām
Locative	vacase	vacasayoḥ	vacaseṣu

Compound vacasa -

Adverb -vacasam -vacasāt